Free · Private · No signup
Free online tools that do one thing well.
Format, convert and clean up your data without sending it anywhere. Every tool runs in your browser, loads fast, and stays out of your way.
Popular tools
Everything runs in your browser. No uploads, no accounts.
Developer Tools Base64 Encoder & Decoder Encode text to Base64 or decode Base64 back to text, with full UTF-8 and URL-safe support. Runs locally in your browser — no upload, no signup. Developer Tools Hash Generator Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text in your browser. Compare digests and copy them instantly. Image Tools Image Compressor Compress JPG, PNG and WebP images in your browser. Control quality, resize by width, compare file sizes and download the result without uploading. Developer Tools JSON Formatter & Validator Format, validate and minify JSON in your browser. Choose 2 or 4-space indentation, sort keys, and copy the result instantly. Free, private, no signup. Developer Tools JWT Decoder Decode a JSON Web Token to inspect its header, payload, signature and expiry claims. Nothing is uploaded and no signature is trusted. Everyday Utilities QR Code Generator Create QR codes for links, text and messages, then download them as PNG or SVG. Adjust size, colors and error correction; everything runs locally. Developer Tools Unix Timestamp Converter Convert Unix timestamps to readable dates and back. Supports seconds and milliseconds, UTC and your local time zone, with a live current timestamp. Developer Tools URL Encoder & Decoder Encode or decode URLs and query strings with correct UTF-8 percent encoding. Switch between component and full-URL modes, all in your browser. Developer Tools UUID Generator Generate random UUID v4 and time-ordered UUID v7 in bulk, then copy or download them as text. Runs locally with the Web Crypto API.
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Pick a workflow and start working.
Why Amai Tools
Small tools that respect your time and your data.
Private by default
Your input never leaves the browser. No uploads, no logs, no accounts.
Fast and static
Pages are pre-rendered HTML. Tool code loads only when you need it.
Free, no limits
No signup walls, watermarks or daily quotas. Use a tool and move on.
Questions, answered
Are these tools really free?
Yes. Every tool on Amai Tools is free to use, with no signup, watermarks or daily limits. Nothing needs to be installed.
Do you upload my data?
No. Tools run entirely in your browser. Files and text you paste are processed on your device and never sent to a server.
Do the tools work offline?
Once a page has loaded, most tools keep working without a network connection, because the logic runs locally. Reloading a page still needs the network.