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How to Generate File Checksums - Step by Step Guide

Create and export multiple SHA digests for file integrity verification

Step 1

Upload a File

Select any file up to 50MB. Processing happens locally in your browser using the FileReader API — no file data is uploaded to any server.

Any file type: Upload binaries, archives, images, documents, or any file format for checksum generation.
Binary reading: Files are read as ArrayBuffer for accurate binary checksums, not text encoding.
Try sample: Click Sample to generate checksums for an embedded CSV dataset.

Example — generating checksums for a release binary:

File: app-v2.1.0-linux-amd64.tar.gz
Size: 12,458,320 bytes

SHA-256: 3a7f2b...e9d1c4
SHA-512: 8c4e1d...f2a7b3

→ Publish these checksums alongside your release artifacts
Step 2

Choose Algorithms

Enable one or more SHA-2 digest algorithms based on your target environment. Multiple algorithms can run simultaneously.

SHA-256 + SHA-512: Default combination covers most GitHub release and package registry workflows.
All four algorithms: Enable SHA-1, SHA-256, SHA-384, and SHA-512 for maximum cross-system compatibility.
Toggle freely: Check or uncheck algorithms at any time — hashes regenerate automatically.
Step 3

Review Generated Hashes

Each selected algorithm produces a deterministic NIST-approved hash displayed in hexadecimal format.

Hex output: Standard lowercase hexadecimal digest for CLI and backend compatibility.
File metadata: File name and byte size are displayed alongside the checksums.
Re-upload: Upload a different file at any time to regenerate all checksums instantly.

Example — multi-algorithm output for a CSV file:

File: transactions.csv (1,247 bytes)

SHA-1:   da39a3ee5e6b...
SHA-256: e3b0c44298fc...
SHA-384: 38b060a751ac...
SHA-512: cf83e1357eef...
Step 4

Download Result Sheet

Export all generated checksums in a single text file for build scripts, package manifests, or software component verification.

Copy: Copy all checksums to clipboard for pasting into CI scripts or release notes.
Download: Save the complete checksum sheet as a plain text file.
Next step: Use Checksum Verify to validate a file against a known expected hash.

Frequently Asked Questions

Which hash algorithm should I use?

Prefer SHA-256 or SHA-512 for modern integrity checks. SHA-256 is the most widely adopted standard. SHA-1 should only be used for backward compatibility with legacy systems.

Is file content uploaded to a server?

No. Files are read locally using the W3C Web Crypto API. Digests are generated entirely in your browser session with no network requests.

Will checksums match command line tools?

Yes. For the same binary file content, the hex output matches tools like OpenSSL dgst, sha256sum, and Python hashlib.

Can I verify compressed file integrity?

Yes. Generate checksums for compressed archives and pair with GZIP Compression or Zstandard Compression workflows.

What is the maximum file size?

The tool supports files up to 50MB. Larger files may cause browser memory issues. For text-only content, you can also use Multi-Hash Generator by pasting the content directly.

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