New free tool

File Hash Checker for SHA-256 Checksums

Calculate SHA-256, SHA-1, SHA-384, and SHA-512 checksums for local files without uploading them to a backend.

Quick answer

A file hash checker reads a file and creates a deterministic checksum such as SHA-256.

If two files produce the same digest with the same algorithm, their bytes are expected to match.

Best inputs for file checksums

Use the original file

Even a tiny byte change creates a different checksum.

Prefer SHA-256

SHA-256 is a practical default for download verification and file fingerprints.

Free ToolBrowser-only file reading

File Hash Checker

Calculate SHA checksums for local files without uploading them to a backend service.

Hash algorithm

Drop files here or click to choose

Files are read locally in your browser for checksum calculation.

This tool uses browser Web Crypto. It supports SHA algorithms; MD5 is intentionally not included because Web Crypto does not expose it.

Checksum results

Use the digest to compare downloads, releases, fixtures, or local files.

Choose one or more files to calculate SHA-256 checksums.

Example

Download a release asset, calculate its SHA-256 checksum, and compare the digest with the checksum published by the project.

Assumption

The browser has enough memory to read the selected file and Web Crypto is available in the current secure context.

Limitation

This tool calculates SHA checksums for files. It does not include MD5, folder hashing, or streaming very large files.

Suggested workflow

File verification path

Use this path when you need to verify a local file and inspect related text fingerprints.

Step 1

Check the file hash

Calculate SHA-256 or another SHA digest for the local file.

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Step 2

Generate a text hash

Hash exact text values when your checksum is based on pasted content.

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Step 3

Compare text differences

Inspect what changed if two copied checksum lists differ.

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Related tools

Related developer utilities

Hash Generator

Generate SHA hashes from exact text input.

Open tool

Diff Checker

Compare text when two fingerprints do not match.

Open tool

Base64 Encoder & Decoder

Encode and decode UTF-8 text locally.

Open tool

Frequently asked questions

Does this file hash checker upload my file?

No. Files are read locally in the browser and hashed with browser Web Crypto.

Which file hash algorithms are supported?

The tool supports SHA-1, SHA-256, SHA-384, and SHA-512. MD5 is not included because browser Web Crypto does not expose MD5.

Can I hash multiple files?

Yes. Select or drop multiple files and the tool will calculate one checksum per file.

What is a checksum used for?

A checksum is often used to compare files, verify downloads, or confirm that a file has not changed.