File Checksum Calculator
Calculate MD5, SHA-1, SHA-256, SHA-512 and CRC32 checksums of a file without uploading it. Free and private: runs in your browser.
Choose a file (or paste text) to compute its checksums locally, then compare them with the publisher's values.
Hashing runs locally in your browser. Your input never leaves this page.
Use cases
- Verify a download or file checksum.
- Create test fixtures for authentication code.
- Debug a hash mismatch between two systems.
Frequently asked questions
How do I verify a download?
Compare the SHA-256 shown here with the checksum on the official download page. If a single character differs, the file is corrupted or tampered with.
Is the File Checksum Calculator free?
Yes. It is free with no sign-up, and it runs entirely in your browser, so your input is never uploaded or stored.
Is hashing the same as encryption?
No. A hash is one-way: you cannot get the input back. Encryption is reversible with a key. Use slow password hashes (bcrypt, Argon2, PBKDF2) for passwords and fast hashes (SHA-256) for integrity checks.
Related tools
Checking one snippet is a start. Scan your whole repository for free with CodeInspector.