Calculate file and text hashes
Compute SHA-256, SHA-512, SHA-1 and MD5 for any text or file, and check a download against the checksum its publisher lists.
- Files never uploaded
- Free, no sign-up
- Works on any device
- Works offline
Drop your file here
or drag and drop · Any file type
Stays on your device — nothing is uploaded
How to use the hash calculator
Add text or a file
Type text or drop any file.
Get the hashes
All four hashes are calculated at once.
Compare
Paste an expected checksum to see if it matches.
About Hash calculator
Verifying a download
Software publishers often list a SHA-256 checksum next to the download. Drop the downloaded file here and paste their checksum — if it matches, the file wasn’t corrupted or tampered with.
Your files never leave your device
Most online PDF sites upload your documents to their servers. DocuVault doesn’t. Everything happens inside your browser, so there is nothing for anyone to see, store or leak.
Check it yourself
Use a tool once, then turn off your Wi-Fi or switch to airplane mode and use it again — it still works. Developers can watch the Network tab: no file is ever sent.
Step 1
You choose a file
Your browser opens it directly from your device — like opening it in an app.
Step 2
Your device does the work
The processing code runs inside this browser tab. No server ever receives your file.
Step 3
You save the result
The new file goes straight to your downloads. Close the tab and everything is gone.
Frequently asked questions
Is there a file size limit?
Files up to about 2 GB work on most computers. Very large files depend on your device’s memory.
Should I use MD5?
MD5 is fine for checking accidental corruption but not for security. Prefer SHA-256.