Free Online Tools, Organised by Job
73hi is a collection of small, fast utilities that run in your browser. They are grouped into eight categories below; open a category to meet its tools, or jump straight to the newest additions at the top.
Latest Update: Two AI Tools That Run in Your Browser
The newest additions to the site are two AI tools that load a real neural network into your browser and run it on your own device - no upload, no server queue and no watermark on the result.
AI Image Generator
Turn a text prompt into a picture with Z-Image-Turbo, fetched from Hugging Face and drawn on your own GPU in the browser.
Open the image generatorAI Text to Speech
Read any sentence aloud with MOSS-TTS-Nano, a tiny speech model that runs on WebAssembly in your browser, with built-in voices and optional voice cloning.
Open the text to speech toolPick a Category
Every category has a hub page that introduces its tools, and every tool page carries a strip linking straight to its siblings.
Image Tools
Pick exact colours from any picture, convert to WebP or ICO, compress images in modern formats and hide data inside them.
Open Image ToolsVideo Tools
Extract frames and make GIFs, blend clips with FFmpeg transitions, and turn photos into slideshow videos with music.
Open Video ToolsAI Tools
Remove photo backgrounds with an on-device neural network and generate pictures from text prompts, both in your browser.
Open AI ToolsText Tools
Compare two texts or large files and highlight every difference, and validate, format, minify, escape or unescape JSON.
Open Text ToolsCrypto Tools
Encrypt and decrypt text, generate RSA key pairs, encode Base64, URL and Unicode, and compute hashes and HMACs.
Open Crypto ToolsNetwork Tools
Look up IP addresses and domains, build cURL commands with code export, search common ports and convert Unix timestamps.
Open Network ToolsPractical Tools
Look up your Chinese zodiac by birth date, open the pixel-bead art studio, or settle a decision with a hand match or a dice roll.
Open Practical ToolsFile Ops
Read APK package info, certificates and components, and pull embedded images and animations out of installers.
Open File OpsAbout the 73hi Collection
Are all 73hi tools free?
Yes. Every tool on the site is free to use, with no account, no signup and no daily limit.
Do the tools upload my files or text?
Almost everything runs in your browser with JavaScript or WebAssembly, so your data never leaves your device. The IP lookup is the only tool that sends what you type to public geolocation services, because that information cannot be resolved locally.
How are the tools organised?
Into eight categories: image, video, AI, text, crypto, network, practical and file operations. Each category has a hub page that introduces its tools, and every tool page carries a strip linking to its siblings.
What is new on 73hi?
The latest update added two AI tools that run in your browser: an AI image generator powered by Z-Image-Turbo and an AI text to speech tool built on MOSS-TTS-Nano, both processing on your own device with nothing uploaded.