Developer tool
Your files never leave your device
Check your Network tab and see
Work starts the moment you drop a file
No daily limit, no sign-up, no watermark
For photos and logos, Image to Base64 on the converter hub is a better fit — it returns a ready data URL with the correct image MIME type so you can drop it straight into CSS or an img src.
A file is read fully into a string before it is encoded, so a 50 MB binary becomes a very large in-memory value that can stall or crash the tab. That is a browser memory limit, not a quota this tool imposes.
The FileReader runs in the page, so the file is never uploaded. It is a safe way to inline a small asset without exposing it to a third-party service.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.
Encode to Base64 or decode from Base64 instantly in your browser.
MD5 for checksums plus SHA-1, SHA-256, and SHA-512 via Web Crypto — all in your browser, nothing uploaded.
Generate valid universally unique identifiers (UUIDs/GUIDs) instantly.
Format, validate, prettify and beautify your JSON data instantly.
Encode or decode query strings with encodeURIComponent — in your browser, nothing uploaded.
HMAC-SHA256 in the browser.
