42 tools that run in your browser

One page each, built from the same Rust and WebAssembly toolbox. Nothing you type is uploaded, and every one of them keeps working offline.

Base64 Encoder and Decoder
Paste text or Base64 and convert it instantly, in your browser.
JSON Formatter and Minifier
Pretty-print unreadable JSON, or squeeze it back down to one line.
JSON Validator
Find out exactly which line and column broke your JSON.
Word and Character Counter
Live counts for words, characters, sentences and reading time.
Lorem Ipsum Generator
Placeholder paragraphs, sentences or words, ready to paste.
SEO Text Analyzer
Keyword density, phrase frequency and readability for your copy.
Typing Speed Test
One minute, real words, honest numbers.
Wheel of Names
Type the names, spin the wheel, get one winner.
Unix Epoch Converter
Timestamps to dates and back, in seconds or milliseconds.
Online Alarm Clock
Set a time, leave the tab open, get woken up.
Online Stopwatch and Timer
Start, lap, reset, or count down instead.
Unit Converter
Eleven categories, a hundred-plus units, instant conversion.
Conversion Tables
Whole reference tables, not one lonely number.
Online Calculator
Type an expression, or use the loan, BMI and percentage tools.
HTML Color Codes
Pick a colour, get every code, check the contrast.
Colour Information
Everything about one colour: codes, name, shades, tints, palettes.
What Is My Screen Resolution?
Your screen size, viewport, pixel ratio and aspect ratio.
URL Encoder and Decoder
Percent-encode a value, or read back one that is already encoded.
Text Case Converter
Every casing style at once, from one box of text.
Hash Generator
Every common digest of your text, computed on your device.
Number Base Converter
Binary, octal, decimal, hex and every base up to 36.
Word Unscrambler
Every word your letters can make, longest first.
JWT Decoder
Read any token's claims, and check an HMAC signature against your secret.
Text Diff Checker
See exactly what changed between two versions.
QR Code Generator
Make a QR code, choose its colours, download it as PNG or SVG.
World Clock and Time Zone Converter
Every place you care about, side by side, and the hours that suit all of them.
Countdown to a Date
How long until it happens, down to the second.
Webcam and Microphone Test
See your camera and watch your mic level, before the call starts.
Compress an Image
Make the file smaller without sending it anywhere.
Image Resizer and Converter
Set the pixels you need, or change the format, without uploading anything.
Merge PDF Files
Put several PDFs into one, in the order you choose, without uploading them.
Split a PDF and Extract Pages
Keep the pages you want and leave the rest, without uploading anything.
CSV Viewer and Editor
Open a CSV of any size, sort and search it, fix what is wrong, and save a copy.
PDF to JPG, PNG or WebP
Turn every page of a PDF into a JPG, PNG or WebP, without uploading it.
JPG to PDF
Put photos or scans into one PDF, in the order you choose, without uploading them.
Crontab Generator
Write a cron expression, read what it means in English, and see when it next runs.
Compress PDF
Squeeze the images inside a PDF until the file fits, without uploading it.
Random Number Generator
Draw numbers from any range, all different if you need them to be, or roll dice.
UUID and ULID Generator
Make identifiers that will not collide, and read the ones you already have.
Keyboard Tester
Press each key and watch it light up. Whatever stays dark is the key that is broken.
Markdown Preview
Type markdown on the left, read it on the right, and take the HTML away.
YAML to JSON and Back
Paste either one and get the other, without uploading it.