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See the public IP address this website receives and whether it uses IPv4 or IPv6. Copy your IP and refresh it after changing your network or VPN.
Compress multiple PNG files without resizing. Choose color reduction, compare the original and result, and download each image locally in your browser.
Calculate with percentages, decimals and parentheses.
Calculate powers, roots, logarithms and trigonometric functions.
Measure time with pause, resume and lap times.
Online countdown timer with pause, resume and an optional sound.
Calculate calendar days between two dates, with an inclusive end-date option.
Count working days with Italian or custom holidays and optional working Saturdays.
Add and subtract durations in hours and minutes, with decimal-hour totals.
Calculate worked hours from intervals, overnight shifts and additional breaks.
Calculate an Italian university grade average weighted by ECTS credits.
Estimate an Italian graduation grade from average, thesis points and bonuses.
Add, subtract, multiply and divide fractions with an exact simplified result.
Solve direct and inverse proportions using the rule of three.
Add VAT to a net amount using a rate of your choice.
Extract VAT from a gross total to find the net amount and tax.
Simulate compound interest with monthly contributions and an annual breakdown.
Generate random passwords with a custom length and character groups.
Generate EAN-13 barcodes and download the image as SVG.
Generate 1 to 100 random version 4 UUIDs in your browser.
Convert Unix timestamps to UTC dates and back, in seconds or milliseconds.
Read a JWT’s JSON header and payload locally without sending the token elsewhere.
Create, import and edit numbered lists with multiple levels for Word and Google Docs.
Organize tasks across personal Kanban boards and a calendar. Drag cards to change status or due dates, save online, and access your boards on desktop or mobile.
Edit multiple photos at once: resize, crop and convert to WebP, JPG or PNG. Compare quality in a live preview and download your images together as a ZIP.
Convert PNG and JPG images to WebP. Adjust quality, check the preview and download your converted images with PNG transparency preserved.
Extract the text stored in a PDF, copy it or download a TXT file. For scanned documents, run OCR first to make the text readable.
Convert hours, minutes and seconds in either direction. Enter a duration, see the conversion steps and get the result in your chosen unit.
Choose an event date, time and time zone. Watch the days, hours, minutes and seconds remaining update in a live countdown.
Preview your PDF pages, drag the thumbnails into a new order and download the rearranged document. Check the page sequence before saving.
Turn an SVG file into a PNG image. Set the output dimensions and background, check the preview and download the converted image.
Build links with UTM parameters for your campaigns. Set source, medium and campaign name, review the generated URL and copy it for use.
Compare foreground and background colors. Calculate their contrast ratio and check WCAG AA and AAA thresholds for normal and large text.
Choose a Schema.org type, fill in its fields and generate JSON-LD. Copy the code and check that it describes the content shown on your page.
Convert JSON arrays into CSV tables and CSV files into JSON. Choose the delimiter and header options, check the data and download the result.
Convert JSON to YAML or YAML to JSON. Check syntax, choose indentation and copy or download the converted data for your configuration files.
Make XML easier to read with consistent indentation and find syntax errors. Copy the formatted result or download it as a file.
Create a robots.txt file with user agents, allowed or blocked paths and sitemap URLs. Review the rules before copying or downloading the file.
Enter equivalent page URLs and language or region codes. Generate reciprocal hreflang tags with an optional x-default version for review.
Find photos and images embedded in a PDF, preview them and download your selection. Review the format and dimensions of the extracted files.
Remove EXIF metadata and GPS coordinates from photos. Compare the detected data before and after removal, then download the processed images.
Estimate charging costs using battery capacity, the charge percentage needed and your price per kWh. Adjust the tariff and charging losses.
Estimate charging time from battery capacity, starting and target charge levels and effective power. Compare scenarios with clear assumptions.
Calculate amps, watts or volts from the values you know. Choose DC or AC and include power factor when the selected circuit requires it.
Enter package dimensions and actual weight. Use your carrier’s divisor to calculate dimensional weight and compare the weight used for billing.
Split a bill between people, add an optional tip and check the amount each person owes. See the total, tip and rounding adjustments.
Generate random first and last names for characters, examples and test data. Choose a language and quantity, then copy the generated list.
Count syllables in English words and text. See counts for each word and line, with estimated results based on language-specific rules.
Convert a PDF to PDF/A for long-term archiving. Download the result after it passes PDF/A-2b validation.
Check a PDF against its PDF/A profile. Review the validation result and see which rules the file fails before you submit it.
Turn an EPUB ebook into a paginated PDF. See how chapters, text, and images appear in the file you can read or print.
Convert a DRM-free EPUB ebook to MOBI 6. Download the file for a compatible reader and check the text, images, and table of contents.
Open two versions side by side, find changed pages, and inspect the highlighted differences in each PDF.
Choose two cities and a date to convert the time. See the local time, the time difference, and whether the destination falls on another day.
Convert an AVIF image to JPG. Adjust JPEG quality and compare file sizes before downloading the converted image.
Extract text from JPG and PNG images with OCR. Choose the document language, download a TXT file and review the recognized text.
Calculate the area of a circle from its radius using A = πr². Enter a measurement, see the result in square units and check a worked example.
Find a circle’s circumference from its radius. The calculator applies C = 2πr and shows the result with a formula and example, without an account.
Calculate triangle area from the base and perpendicular height using A = b × h ÷ 2. Use matching measurement units and get the area in square units.
Calculate trapezoid area from two parallel bases and perpendicular height. Apply A = (B + b) × h ÷ 2 and compare the result with a worked example.
Find rectangle area by multiplying length and width. Enter both measurements in the same unit, see the result and check the formula and example.
Calculate rhombus area from its two diagonals using A = D × d ÷ 2. Enter their lengths in matching units and check the result, formula and example.
Calculate parallelogram area from its base and perpendicular height. The height is not the sloping side; check the formula and example before entering values.
Calculate sphere volume from its radius using V = 4πr³ ÷ 3. Get a result in cubic units and see how volume differs from the sphere’s surface area.
Calculate cylinder volume from the base radius and height using V = πr²h. Use matching measurement units and check the formula and worked example.
Find cone volume from the base radius and perpendicular height. Apply V = πr²h ÷ 3 and check a worked example with a result in cubic units.
Calculate cube volume by cubing its side length: V = s³. Enter the edge measurement and see the result, formula and example in cubic units.
Calculate the volume of a rectangular prism or cuboid from length, width and height. Use matching units for the three edges and check a worked example.
Calculate pyramid volume from the base area and perpendicular height. Apply V = A × h ÷ 3 and check an example with square and cubic units.
Calculate the square root of a non-negative number, including decimals. Enter the radicand and get the result with a formula and example.
Find the prime factorization of an integer from 2 to 1 trillion. See the product of prime factors with their exponents and copy the result.
Solve linear and quadratic equations by entering coefficients a, b and c. Find real or complex roots and identify equations with no or infinitely many solutions.
Calculate the least common multiple of two or more non-negative integers. Separate numbers with spaces or semicolons and get an exact integer result.
Find the greatest common factor or divisor of two or more non-negative integers. Enter your number list and calculate an exact result, without an account.
Calculate combinations without repetition using n choose k. Select k items from n when order does not matter, with exact results for up to 1,000 items.
Convert degrees to radians or radians to degrees. Choose the starting unit, enter an angle and check the result with the conversion formula.
Merge 2–20 PDFs in selection order, up to 1000 pages total. Form values are preserved with distinct names per document.
Split a PDF into one-page documents in a ZIP archive. Use all for every page or a range such as 1-3,5.
Create a PDF containing only selected pages. Example: 3,1-2 preserves that order; duplicate selections are removed.
Delete selected pages while retaining the original order of the others. At least one page must remain.
Rotate selected pages clockwise by 90, 180 or 270 degrees, in addition to any existing rotation.
Crop PDF margins in millimetres relative to the page as displayed. Changes the visible area; hidden content is not deleted.
Compress a PDF with light, medium or strong compression. Reduce image size while retaining text and vector graphics.
Turn up to 20 JPG, PNG or WebP images into PDF pages in selection order. Corrects EXIF orientation and uses white behind transparency.
Convert PDF pages to JPG or PNG at 72–200 DPI. One page produces an image; multiple pages produce a ZIP archive.
Upload an AcroForm and inspect it. Fill in the displayed fields, then process again to download the PDF. Does not support XFA forms or scans.
Add a drawn signature or typed name to a PDF. This is a graphical signature without a certificate or identity verification. Coordinates refer to the page as displayed.
Edit existing PDF text, move words and images, and organize pages. Use the free online PDF editor with multiple selection, preview and PDF download.
Convert PDF to DOCX: editable text with simple layout, or page images preserving appearance. Scanned text requires OCR first.
Convert Word DOCX documents to PDF in an isolated process. Macros disabled and no network; missing fonts can affect layout.
Extract PDF tables to Excel XLSX, one sheet per table. Detect borders or text alignment. Scans require OCR first.
Make a scanned PDF searchable with local OCR in nine languages. Up to 100 selected pages; output includes only those pages. Check recognized text.
Convert PDF pages to PowerPoint PPTX, one page image per slide. Preserves appearance; text inside images is not editable.
Convert PowerPoint PPTX presentations to static PDFs. Animations and transitions do not play; available fonts can affect appearance.
Number selected PDF pages from your chosen starting number. Numbers are centered at the bottom of the page as displayed without removing content.
Protect PDFs with AES-256 or remove encryption using the correct password. Does not recover forgotten passwords. Keep the new password somewhere safe.
Remove backgrounds and isolate the subject of your photo. Transparent PNG output; up to 64 megapixels. Check subject edges and details.
Enhance images with local FSRCNN AI at 2×/4× (8 MP output) or classic contrast and sharpness. May introduce artifacts; cannot reliably recover lost details.
Resize JPG, PNG and WebP. With aspect ratio enabled, the image fits inside the maximum dimensions; disable it for exact dimensions. Up to 64 megapixels.
Crop JPG, PNG and WebP by dragging a selection over your image. Choose an aspect ratio, check the live preview and download the result.
Convert the main image of a HEIC or HEIF file to JPG, correcting EXIF orientation. Collections and animated sequences are not supported.
Convert PNG to JPG with white behind transparent areas. JPEG uses lossy compression and does not preserve transparency.
Convert JPG to PNG without further lossy compression. Does not recover detail already lost in JPEG; the file may become larger.
Convert static WebP to PNG or JPG. PNG preserves transparency; JPG uses a white background. Animations are not supported.
Reduce JPG size with quality from 10 to 95. Compression loses detail; if the result is not smaller, the original file is returned.
Prepare a 35×45 mm crop at 400 DPI (551×709 px). Adjust the crop center. Does not verify face, background or acceptance: check the issuing authority requirements.
Estimate a fixed nominal-rate mortgage payment with a monthly schedule. Rounded to cents with an adjusted final payment; fees and variable rates excluded.
Calculate a fixed nominal-rate loan payment and interest cost. 1–600 monthly payments; extra fees excluded. Final payment adjusted to the remaining balance.
Generate a fixed-payment monthly amortization schedule: principal, interest and remaining debt. Export CSV. Fixed nominal rate, exact cents, adjusted final payment.
Estimate APR from principal, equal monthly payments and entered fees. Solves cash-flow present value with equal months. Does not replace contractual APR.
Simulate a savings plan with initial capital, monthly deposits and constant effective annual return. Annual table and CSV; excludes tax, costs and inflation.
Calculate ROI as net profit divided by investment cost. Revenue or final value and costs must cover the same period; the return is not annualized.
Calculate attributed revenue divided by advertising spend. A 3× ROAS equals 300% of ad costs and does not measure net profit.
Distinguish margin on price from markup on cost. Cost 60 and price 100 gives 40% margin and 66.67% markup. Use values excluding VAT for a consistent comparison.
Find units needed to cover fixed and variable costs. Rounds units up; unit price must exceed variable cost. Single-product model.
Find selling price from cost and target margin or markup. Margin must be below 100%. Currency result rounded up to cents, without automatic VAT.
Calculate L/100 km, km/L and fuel cost from distance, fuel used and price. Distance and fuel must refer to the same trip; cost in euros.
Convert kW, metric horsepower CV/PS and mechanical horsepower hp. CV and hp are different units; select the correct one for vehicle data.
Convert international miles and kilometers in both directions. One mile is exactly 1.609344 km; these are not nautical miles.
Convert Celsius and Fahrenheit with a kelvin value. Absolute zero is −273.15 °C or −459.67 °F; lower temperatures are rejected.
Convert liters and gallons choosing the US liquid or UK imperial gallon. They differ: 3.785411784 L versus 4.54609 L.
Convert 11 quantities: length, mass, volume, temperature, duration, speed, area, pressure, energy, power and data. Distinguishes decimal and binary prefixes.
Calculate adult BMI from weight and height. A general index, not a diagnosis: it does not distinguish muscle and fat or apply in the same way during pregnancy or childhood.
Estimate resting energy with Mifflin–St Jeor (ages 19–78). Not a clinical measurement of basal metabolism. Not for pregnancy, breastfeeding or medical conditions.
Indicative energy estimate: Mifflin–St Jeor × chosen PAL (1.4–2.4), for healthy adults 19–78. Not a diet prescription; excludes pregnancy, breastfeeding and medical conditions.
Calculate average pace per km and mile and speed from distance and time. Projections assume constant pace and do not predict performance or endurance.
Trim a precise video interval and download H.264/AAC MP4. Start and end in seconds; re-encoding may lose quality. Files up to 500 MB and 2 hours.
Create an animated GIF from a 0.1–15 second interval. 480 px wide, 12 fps, no audio. GIFs can be larger than the original video.
Extract the first video audio track to MP3 or WAV. Also converts audio files, including MP3 to WAV. Does not recover detail lost in the source.
Reduce video size with H.264/AAC and adjustable CRF. If not smaller, no larger download is offered. Does not retain subtitles or multiple tracks.
Convert MOV to MP4. Compatible H.264 video and AAC/MP3 audio are remuxed; otherwise re-encoded to H.264/AAC. Keeps the first audio track.
Transcribe up to 1 hour of speech with local AI, without external services. Auto-detect or choose a language; check the text before using it. TXT output.
Format or minify JSON while preserving numbers and duplicate keys. Browser processing: 1 million input characters, 100 nesting levels, 4 million output characters.
Validate JSON syntax and locate errors by line and column. Does not validate JSON Schema and allows duplicate keys. Up to 1 million characters and 100 levels.
Encode and decode UTF-8 text with standard Base64 or Base64url. Text up to 200,000 characters; Base64 strings up to 1 million. Binary files not supported.
Test JavaScript regex with groups and indices. Isolated worker, 1 second limit, 100,000 text characters, 1,000 results and 500,000 captured characters. Not PCRE.
Find the median of a number list, including decimals and negative values. See the observation count, minimum and maximum.
Find the statistical mode, its frequency and every tied mode in a number list. Free, without an account.
Calculate population or sample standard deviation, with the mean, variance and denominator used in the calculation.
Calculate population variance or corrected sample variance. Compare the mean and standard deviation alongside the result.
Calculate A or B, A and B, neither event and A given B. Choose independent, mutually exclusive or known-intersection events.
Calculate permutations of distinct or repeated elements. Exact integer answers for up to 1,000 elements, without rounding.
Calculate a triangle’s perimeter from three sides and check whether the lengths can form a valid triangle.
Calculate the area of a regular hexagon from its side length, with a formula, example and result in square units.
Calculate a sphere’s surface area from its radius using 4πr². Includes a worked example and square-unit results.
Calculate the area, perimeter and apothem of a regular polygon using its number of sides and side length.
Count words, characters with and without whitespace, lines and paragraphs as you type. Handles accents and emoji, without an account.
Convert text to uppercase, lowercase, title case or sentence case. Copy the result or download a TXT file.
Compare two texts by word or line and highlight additions and deletions. Find changes without uploading documents.
Remove duplicate lines while keeping the first occurrence. Optionally ignore case or leading and trailing whitespace.
Sort lines alphabetically in the selected language, ascending or descending, with optional natural number ordering.
Clean up repeated spaces, tabs and blank lines. Choose operations without accidentally merging every line into one paragraph.
Remove accents from Latin letters and optionally remove punctuation and symbols. Retains letters and numbers from other writing systems.
Generate Lorem Ipsum for drafts and layouts. Choose an exact word count or up to 100 paragraphs, with copy and TXT download.
Create QR codes with custom colours, size and error correction. Download PNG and SVG after an automatic readability check.
Read a QR code from PNG, JPG or WebP and copy the decoded text. No camera required and no links opened automatically.
Combine files into a ZIP archive with normal, maximum or no compression. Files are processed on your device.
Browse a ZIP archive and download individual files with checks on paths and expanded sizes.
Convert an Excel XLSX sheet to CSV with sheet selection, delimiters, BOM and formula protection. Preview rows before downloading.
Turn CSV or TSV into Excel XLSX with delimiter and encoding options. Preserve leading zeroes and formula-like text.
Trim MP3, WAV, FLAC and other audio with selection playback, precise start and end, fades and output settings.
Join MP3, WAV or FLAC tracks in your chosen order, with optional crossfade and MP3, WAV or FLAC output.
Convert audio to MP3, WAV or FLAC with bitrate, sample rate, channels and lossless bit-depth options.
Record voice with pause, a level meter and immediate playback. Download 16-bit mono WAV without uploading your recording.
Add or subtract days from a date and find the resulting date and weekday. Includes weekends, holidays and leap years, with no registration.
Estimate Italian net salary from gross pay or find gross pay from net income for 2026. Adjust contributions, local taxes and payments, with an annual breakdown.
Estimate Italian net pension from gross income for 2026, or reverse the calculation. View annual tax, pension deductions and the monthly average over 13 payments.
Summarize PDF, Word DOCX, ODT and text with AI. Review the text before sending it to OpenAI, choose a length and copy the summary. Verified account required.
Check spelling, grammar and punctuation with OpenAI. Import or paste text, compare versions and review corrections. An email-verified account is required.
Rewrite sentences and paragraphs with OpenAI in a natural, simple or formal style. Compare the original and result. An email-verified account is required.
Calculate age from a date of birth in years, months and days. Choose a reference date and see the number of days until the next birthday.
Calculate a percentage of a number, find the percentage between two values, or work out an increase or decrease with clear formulas and steps.
Calculate sale price, savings and stacked discounts. Find the discount percentage from two prices or work back to the original price.
Pick random numbers within a range, with or without duplicates. Choose the count and sort order, then copy or download your list in the browser.
Solve long division with remainders and decimal places. Follow every subtraction, check the quotient and copy the working, including decimal inputs.
Convert real measurements to scale, scale to real, or between two scales. Choose units and ratios for drawings, maps and models.
Translate Latin letters, digits and supported punctuation to Morse code and decode it back. Separate letters with spaces and words with a slash.
Generate random words from curated lists in ten languages or your own list. Filter by length, control repeats and copy or download the result.
Calculate slope from two points or rise and run. Convert between percent grade and degrees and explore the triangle with intermediate calculations.
Find the network, address range, subnet mask and address count from an IP address and CIDR prefix. Includes IPv4 point-to-point networks and IPv6.
Convert decimal numbers to binary and back, or translate UTF-8 text into binary bytes. Copy or download the result in your browser.
Convert an Excel XLSX workbook to PDF using its sheets and print settings. Download the document created by the isolated Office conversion process.
Compare two XLSX or CSV files by row position or a key column. Find changed cells, added and removed rows, then download a CSV report.
Alternate focus and breaks with custom durations, cycle counts, pause and resume. The timer runs in your browser.
Find the width-to-height ratio and calculate a new dimension while keeping proportions. No image upload required.
Convert pixels and density into inches or centimetres. Find effective print PPI without changing the image file.
Estimate file transfer time from size and speed. Distinguish MB, MiB and Mbps and adjust transfer efficiency.
Convert decimal numbers and exponential notation in either direction while preserving the digits you enter.
Compare a measured value with a reference. Calculate signed difference, absolute error, relative error and percentage error.
Read four-band and five-band resistors. Calculate nominal resistance, tolerance and the minimum and maximum values.
Encode HTML characters and decode numeric and named references. Results remain text and never execute HTML.
Indent HTML fragments while preserving attributes, text and pre, script and style blocks. Copy the code and review whitespace.
Compare two JSON documents independently of object key order. Find additions, removals and changes using JSON Pointer paths.
Create favicons from an image, text or emoji. Preview and download several PNG sizes and an ICO file, with image processing in your browser.
Check IBAN format, national length and checksum in your browser. Your bank account number is not sent to a banking service.
Generate analogous, complementary, triadic and monochromatic color palettes. Copy HEX codes and download the palette as CSS variables.
Preview a Google-style snippet using your title, URL and meta description. Compare mobile and desktop and estimate title width.
Create linear and radial CSS gradients with two colors, a custom angle and a preview. Copy the code or download a CSS file.
Convert between HEX, RGB, HSL and CMYK. Preview the color, copy the values and download all four color representations.
Create an XML sitemap from a URL list or by crawling your website. Review discovered pages, edit the list and download your sitemap.xml file.
Check a URL’s HTTP redirects, status codes and final destination. Follow each step in the redirect chain and identify loops or unexpected hops.
Check a domain’s SSL certificate, expiry date, issuer and covered hostnames. Review the validity and details of the website’s TLS certificate.
Check your domain’s SPF, DKIM and DMARC DNS records. Enter a DKIM selector to review email authentication syntax, configuration and policies.
Format SQL queries with readable indentation. Choose a supported SQL dialect, copy the formatted result and organize code without running queries.
Minify CSS or JavaScript code, compare the original and output sizes, and copy the result. Select your language and reduce the size of your code.
Convert Linux file permissions between numeric and symbolic notation. Set read, write and execute permissions for the owner, group and others.
Look up a domain’s A, AAAA, MX, TXT, NS, CNAME and CAA records. Inspect responses and errors without treating one resolver as a global propagation test.
Look up a domain’s published registrar, dates, status and nameservers with RDAP. Redacted or unavailable registration fields remain clearly identified.
Inspect a page’s CSP, HSTS and other HTTP response headers. Read actual values and contextual explanations; this check does not certify website security.
Crawl your site with HTML and JavaScript to find broken links and missing resources. Review source pages and redirects, then download the CSV report.
Check a page’s Open Graph title, description, URL and image. See an illustrative sharing preview and identify missing or duplicate metadata.
Test robots.txt rules for a URL and user agent. See the matching allow or disallow rule; crawl permission alone does not guarantee search indexing.
Calculate simple interest and the final balance from your principal, rate and time period. Review the formula and steps using the rate you provide.
Calculate gross pay from hours and your hourly rate, or work out an hourly wage from gross earnings. Set the hours and period; taxes are not calculated.
Compare money across years using official World Bank/IMF CPI data. Choose a country and available years to calculate cumulative inflation and purchasing power.
Calculate mileage reimbursement with your own rate, IRS rates by travel date or French passenger car tables. Check distance units, sources and validity periods.
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