How it works
Click generate to create RFC-style UUID v4 values using crypto randomness — copy as many as you need.
Generate RFC-compliant UUID v4 identifiers instantly.
How many UUIDs?
Generated UUIDs (v4)
Click generate to create RFC-style UUID v4 values using crypto randomness — copy as many as you need.
Conversions run in your tab with JavaScript — no desktop app required.
Files stay on your device during processing. We do not receive your uploads.
Heavy codecs and AI models run locally via Web Workers and WASM (FFmpeg.wasm, Transformers.js).
Click generate to create RFC-style UUID v4 values using crypto randomness — copy as many as you need.
UUID v4 is random, not guaranteed unique across systems — use appropriate uniqueness checks in databases. Processing is 100% offline in your browser — files never leave your device.
Yes. This tool is free convert online with no signup. Processing stays in your browser — no uploads.
You control quality settings. Choose higher quality for no quality loss when converting online.
Every conversion runs inside your browser tab using JavaScript and Web Workers. There is no background server queue and no account is required for core tools.
Your files are never uploaded to FreeConvertKit for processing. Originals, previews, and exports stay on your device unless you choose to download or share them yourself.
When codecs or AI models are needed, WebAssembly modules such as FFmpeg.wasm and Transformers.js execute locally — giving you desktop-class power with absolute file privacy.
Create strong random passwords with custom length and symbols.
Create QR codes for URLs, text, Wi‑Fi, and more — generated on your device.
Overlay text or an image on every page without uploading.
Convert MP4 videos to WebM with a quality slider.
Trim bitrate or switch to mono for voice notes.
Turn clips into crisp GIFs with two-pass palettes and 12–24 fps.