150 free tools · no sign-up · no upload
Do more. Simply.
Merge a PDF, compress a photo, convert a file, format some JSON, settle a calculation — free, with no sign-up. Almost everything runs inside your browser, so your files are never uploaded.
What do you want to do?
- No upload — files stay on your device
- No account, no watermark
- No file limits or credits
Pick a path
Eleven categories, every one of them free.
Start here
The tools we would show a friend first.
Combine several PDFs into one, in the order you choose.
Break one PDF into separate files by page count or range.
Make a PDF smaller, with an honest choice about the trade-off.
Turn every page of a PDF into a JPG image.
Turn JPG photos into a single PDF document.
Pull the plain text out of a PDF.
Turn a PDF into an editable .docx document.
Read the text out of a scanned PDF.
See every page and drag, rotate or delete it.
Permanently remove sensitive text, not just cover it.
Draw your signature and place it on the page.
Add a password and lock down printing and copying.
Remove a password or restrictions from your own PDF.
Shrink JPG, PNG or WebP files without leaving your browser.
Resize pictures to exact pixel dimensions or a percentage.
Convert iPhone HEIC photos into JPGs anything can open.
Convert between JPG, PNG and WebP — any direction.
Pull the words out of a photo or screenshot.
Convert any video to MP3 — MP4, MOV, WebM and more. Free, and nothing is uploaded.
Catch spelling, grammar, punctuation and wordiness as you type.
Tighten wordy writing with every edit shown and reversible.
APA, MLA, Harvard, Chicago, IEEE and Vancouver references.
A fast notepad that saves in your browser. No account.
Run two, three or four DO101 tools side by side.
A project WBS spreadsheet with a Gantt, built for Excel.
Draw, diagram and explain on one infinite white canvas.
Translate both ways, with furigana, romaji and typing help.
Romaji to hiragana and katakana, and back, exactly.
Live word, character, sentence and reading-time counts.
Beautify, minify and validate JSON with error positions.
Make a QR code for a link, text, email, phone or Wi-Fi.
A big, calm clock for your second screen.
Spin a real globe and learn where every country is.
Sleep on the train and get woken before your stop.
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 12 languages.
Play 301 with up to five friends on one shared board.
Race a friend on the same text, live, from a shared link.
Hit 30 targets as fast as you can.
How many clicks per second can you manage?
A number flashes up. Type it back.
Slide the tiles, merge the numbers, reach 2048.
Free PDF tools
Merge, split, compress, convert and sign — without uploading your documents.
News
Tech and AI news, 74 sources, one page
Headlines from OpenAI, DeepMind, The Verge, Ars Technica, CoinDesk, Nature and dozens more — merged, de-duplicated and refreshed continuously. Every link goes straight to the publisher. No account, no newsletter, no tracking.
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 — no account, no leaderboard full of strangers.
What is DO101?
DO101 is a free collection of 150 everyday online tools: a full set of PDF tools, image compressors and converters, document and data converters, text utilities, developer tools like a JSON formatter and Base64 encoder, SEO helpers, practical calculators, a QR code generator and a few 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 — “compress this photo under 200 KB”, “make this JSON readable”, “how old is someone born in 1997”. 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 — the optional AI assistant is the only one — the page says so plainly. You can read exactly what happens where on the privacy page.
What people come here to do
The jobs that bring most people to DO101 are merging PDFs, turning a PDF into an editable Word file, compressing a photo under a size limit, opening an iPhone HEIC photo, pulling the audio out of a video as an MP3, making JSON readable and counting words. Each one is a full page with the working tool at the top and a proper explanation underneath.
What DO101 will not do
Being useful means being honest about the edges. DO101 does not offer PDF password removal or encryption, because a browser cannot do either reliably. Its PDF-to-Word conversion recovers text and paragraphs but not page layout, and it says so on the page rather than handing back a mangled document. There are no invented usage statistics, no fake reviews and no simulated opponents anywhere on the site.
Free developer tools
The utilities you keep in a browser tab all day — without the ad walls.
Free image tools
Compress, resize and convert — your photos never leave the device.