Free Checksum Generator

Publish a file, share its checksum, and anyone can prove the download arrived intact. The Checksum Generator creates MD5, SHA-1, SHA-256 or SHA-512 digests for typed text or any file on your device — read locally, never uploaded. It's the simplest way to verify integrity before you trust a download.

The file is read locally — it is never uploaded.

Private by design. This tool runs 100% in your browser — your text and files are hashed locally and never uploaded or stored anywhere.

How to Use the Checksum Generator

  1. Select a hash algorithm (SHA-256 recommended).
  2. Type text or choose a file to checksum.
  3. The checksum appears instantly, with a copy button.
  4. Share the checksum alongside a download so others can verify integrity.

Features

Four algorithms; text and file modes; local file reading; copy button; file size display.

Benefits & Use Cases

Verify software installers against published checksums, generate checksums to ship alongside your own releases, or fingerprint documents for version tracking.

Tips

Use SHA-256 for checksums you publish — it is the current standard. A checksum proves integrity (no corruption), not authenticity (who made it); for authenticity you need a digital signature.

Frequently Asked Questions

What is a checksum?

A checksum is a short fingerprint computed from data. If even one byte changes, the checksum changes completely — so matching checksums prove the data is intact.

Which algorithm should I choose?

SHA-256. It is secure, universally supported, and fast. MD5/SHA-1 are only for matching checksums someone else already published.

Is my file uploaded anywhere?

No. Your browser reads the file directly from your device and hashes it locally. The file never leaves your computer.

Checksum matches — am I safe from malware?

It proves the file was not corrupted in transit, but not that it is safe: if the download source itself was compromised, the checksum will match the malicious file too. Download from trusted sources.

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