File checksum

Work out the MD5, SHA-1, SHA-256 or SHA-512 of a file to check that what you downloaded is what was published. The file never leaves your device.

Up to 20 files, 500 MB each

About this tool

Where it runs: Right in your browser, on your own device. The file goes nowhere — unless it turns out too large for the browser, in which case we say so and fall back to the server.
What it accepts: Files of any type: the contents do not matter here.
Limits: Up to 20 files at a time, each up to 500 MB, 1 GB in total.

More in Utilities

File to base64 and backin your browserEncode a file as base64 — to paste an image straight into CSS, say — or decode a base64 string back into a file. The direction is worked out for you.