28 free tools ยท no sign-up
Do more. Simply.
Free online tools, fast answers, and fun challenges โ all in one place. Most of them run right inside your browser, so nothing is uploaded.
What do you want to do?
- Files never uploaded
- Instant results
- Free, forever
Pick a path
Six categories, every one of them free.
Start here
The tools we would show a friend first.
Shrink JPG, PNG or WebP files without leaving your browser.
Resize pictures to exact pixel dimensions or a percentage.
Make a QR code for a link, text, email, phone or Wi-Fi.
Live word, character, sentence and reading-time counts.
Beautify, minify and validate JSON with error positions.
Work out an exact age in years, months and days.
Every percentage question in one place, with the formula shown.
Measure your WPM and accuracy in 15, 30 or 60 seconds.
Race a friend on the same text, live, from a shared link.
Games
How fast can you actually type?
Take the 60-second typing test, then challenge a friend to a live 1v1 in Typing Battle. Your best scores are saved on your device โ no account, no leaderboard full of strangers.
What is DO101?
DO101 is a free collection of everyday online tools: image compressors and resizers, text counters and cleaners, developer utilities like a JSON formatter and Base64 encoder, practical calculators, a QR code generator, and a set of quick browser games. There is nothing to install and nothing to sign up for.
The idea is simple. You usually arrive at a tools site with one specific job โ โcompress this photo under 200 KBโ, โmake this JSON readableโ, โhow old is someone born in 1997โ. DO101 gets you to the answer in as few clicks as possible, then points you at the tool you are likely to need next.
Why browser-based tools?
Most DO101 tools never send your data anywhere. Image compression, resizing and conversion happen with the canvas API built into your browser. JSON, Base64, hashing and regex all run locally too. That means three things: your files stay private, the result is instant because there is no round trip to a server, and the tools keep working even on a slow connection.
Where a tool does need a server โ the optional AI assistant is the only one โ the page says so plainly. You can read exactly what happens where on the privacy page.
Popular online tools
The most-used pages on DO101 are the image compressor, the JSON formatter, the word counter and the typing speed test. Each one is a full page with the tool at the top and a proper explanation underneath.
Free developer tools
The utilities you keep in a browser tab all day โ without the ad walls.
Free image tools
Compress, resize and convert โ your photos never leave the device.