Every tool, grouped by the job it does
47 tools across six groups. Each page explains what the tool does, how to use it, what it cannot do, and where the technical facts come from.
PDF tools
Compress, merge, split, rotate and convert PDF files in the browser.
PDF Compressor
Compress a PDF in your browser. Lossless mode rewrites the file and keeps text selectable; Balanced and Strong re-render every page as a JPEG image.
Merge PDF
Combine two or more PDFs into one file called merged.pdf, in the order you selected them. Pages are copied by pdf-lib in your browser; nothing is uploaded.
PDF to Word
Turn a text-based PDF into a DOCX by extracting its text with pdf.js and writing it with the docx library in your browser. Layout, images and fonts are lost.
JPG to PDF
Place JPG, PNG or WebP images on A4 pages, one per image, portrait or landscape to match, and download images.pdf. Built with pdf-lib in your browser.
Split PDF
Pick pages such as 1, 3-5, 9 from a PDF and download them as one new PDF named after the original. Pages are copied in your browser without re-rendering.
Rotate PDF
Rotate every page or listed pages of a PDF by 90, 180 or 270 degrees. Only each page's rotation attribute changes, so text and images are untouched.
Images tools
Compress and resize images, convert between JPG, PNG, WebP and more, and make QR codes.
Image Compressor
Shrink a JPG, PNG or WebP in your browser with a quality slider (35 to 95). The output is always WebP at the original pixel size. Nothing is uploaded.
Image Resizer
Set an exact width and height in pixels, keep the proportions linked or set them free, and download a PNG. Works on any image your browser can open; no upload.
QR Code Generator
Type a link or text and download an 800 pixel PNG QR code made in your browser with level H error correction. No tracking, no expiry, no sign-up.
PNG to JPG
Convert a PNG or WebP to JPG in your browser. Choose the color that fills transparent areas and a JPEG quality from 45 to 100; the pixel size stays the same.
JPG to PNG
Turn a .jpg or .jpeg into a PNG at its original width and height; there is no quality setting. The PNG is often larger than the JPG. Nothing is uploaded.
JPG to WebP
Re-encode a .jpg or .jpeg as WebP in your browser with a quality slider from 45 to 100. Same pixel size, no metadata copied, nothing sent to a server.
PNG to WebP
Re-encode a PNG as WebP in your browser with a quality slider from 45 to 100. Transparent areas stay transparent and the pixel size is unchanged. No upload.
WebP to JPG
Convert a WebP image to JPG in your browser. Pick a JPEG quality from 45 to 100 and the solid color that replaces transparent areas. Nothing is uploaded.
WebP to PNG
Convert WebP to PNG in your browser with transparent pixels kept and dimensions unchanged. Lossless output, so photos usually get larger. No upload.
GIF to PNG
Convert a GIF to a still PNG in your browser. Animated GIFs give a PNG of the first frame only; colors, dimensions and transparency are kept. No upload.
BMP to PNG
Convert a BMP bitmap to PNG in your browser with no quality loss. Uncompressed bitmaps usually shrink a lot; unusual BMP variants may not decode. No upload.
SVG to PNG
Convert an SVG to a transparent PNG in your browser. Output size comes from the width and height in the SVG file; there is no resize option.
Text tools
Count words, change case, compare versions and clean up lists.
Word Counter
Count words, characters with and without spaces, sentences and reading time at 220 words per minute as you type. Text stays in your browser and is never saved.
Case Converter
Change text to UPPER CASE, lower case, Title Case or Sentence case in your browser, then copy it or download converted-text.txt. Rules and quirks are explained.
Text Compare
Paste two versions to see which lines are unchanged, changed, added or removed. Lines are matched by position and compared exactly, in your browser.
Remove Duplicate Lines
Paste a list to drop repeated lines while the first copy of each stays in place. Choose case-sensitive matching and whether blank lines go. Copy or save as TXT.
Developer tools
Format JSON, encode and decode text, check colour contrast and generate passwords.
Password Generator
Generate a random password of 8 to 64 characters from lowercase letters plus optional uppercase, digits and 14 symbols, using crypto.getRandomValues locally.
JSON Formatter
Paste JSON to check it parses, pretty-print it with two-space indentation or minify it to one line. Errors report the position; nothing is sent to a server.
Image to Base64
Choose a PNG, JPG, WebP, GIF or SVG and get a complete data URL (data:image/...;base64,...) built from the file's own bytes. Copy it or save it as a text file.
CSV to JSON
Paste comma-separated text with a header row and get a JSON array of objects. Quoted fields with commas and line breaks are handled; every value stays a string.
URL Encoder & Decoder
Percent-encode text for a URL query value, or decode an encoded component back to readable text. Uses encodeURIComponent, so non-ASCII becomes UTF-8 bytes.
Base64 Encoder & Decoder
Encode any text, including accents and emoji, as standard Base64, or decode Base64 back to UTF-8 text. Whitespace is ignored on decode; bad input is reported.
Color Contrast Checker
Enter two hex colors to get the WCAG contrast ratio and Pass or Fail results for normal text AA, large text AA and normal text AAA. Calculated in your browser.
Number Base Converter
Convert whole numbers between binary, octal, decimal and hexadecimal with JavaScript BigInt, so huge integers stay exact. Integers only, no two's complement.
Unix Timestamp Converter
Turn a Unix timestamp in seconds or milliseconds into a UTC ISO 8601 date and your local time, or convert a local date and time back to Unix seconds.
HEX, RGB & HSL Converter
Enter a 3- or 6-digit HEX color and get rgb() and hsl() values ready to paste into CSS, plus a swatch. Opaque colors only; HSL is rounded to whole numbers.
Converters tools
Convert length, weight, temperature, area, volume, speed and data units.
Unit Converter
Convert length (meter to inch), weight (kilogram to ounce) and temperature (Celsius, Fahrenheit, Kelvin) with exact international factors. Three groups only.
Area Converter
Convert nine area units: square millimeter to square kilometer, square foot, square yard, square mile, acre and hectare, with exact international factors.
Volume Converter
Convert liters, milliliters and cubic meters to US gallons, quarts, pints, cups, fluid ounces, cubic inches and cubic feet. US customary only, no imperial.
Speed Converter
Convert speed between kilometers per hour, miles per hour, meters per second, knots and feet per second with exact factors. Five units; no Mach or running pace.
Data Storage Converter
Convert bits, bytes, KB, MB, GB and TB using powers of 1000, or KiB, MiB, GiB and TiB using powers of 1024. One standard at a time; up to terabytes.
Calculators tools
Everyday arithmetic for percentages, dates, bills, tax, fuel, margins and averages.
Percentage Calculator
Work out X percent of a number, what percent one number is of another, and the percentage change between two values. Runs in your browser with no sign-up.
Age Calculator
Find an exact age in years, months and days from a date of birth, on today's date or any other date, plus total days lived and the days to the next birthday.
Date Difference Calculator
Count the days between two dates, with full weeks and leftover days and a years-months-days breakdown. Tick one box to include both end dates in the count.
Discount Calculator
Enter a price and a percentage off to see what you save and the sale price. Add a tax rate and the tool applies it to the discounted price, not the original.
Tip Calculator
Enter the bill, pick a tip percentage from the quick buttons or type your own, and split the total evenly between any number of people. Runs in your browser.
Sales Tax Calculator
Enter a pre-tax amount and the sales tax rate that applies where you buy, and see the tax and total. Rates vary by place; the tool applies the rate you type.
Fuel Cost Calculator
Estimate the fuel a trip needs and what it costs from distance, fuel economy in km/L or MPG and the price per liter or gallon. No unit conversion is applied.
Margin & Markup Calculator
Enter an item's cost and selling price to get gross profit, profit margin (profit over price) and markup (profit over cost), with both formulas explained.
Average Calculator
Paste numbers separated by commas, spaces, semicolons or new lines to get the mean, median, count, sum, minimum and maximum. Values are parsed in your browser.
Time Duration Calculator
Enter start and end clock times and an optional break in minutes to get the net duration as hours and minutes, decimal hours and total minutes. Overnight works.