File Hash Calculator — Browser File Utility

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File Hash Calculator is a browser-based file utility that calculates sha-256 and sha-1 hashes for a file.

File Hash Calculator

Local processingUnsupported formats or browser encoders are shown as clear errors.

Runs in your browser

Selected files and input are not uploaded to a server. Preview, conversion, hashing, and download file creation run in this browser session.

Supported input: Any file
Output: SHA-256 and SHA-1
Max file size: 25.00 MB
Max pixels: 32,000,000 px

Drag a file or click to choose

SHA-256

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What is it

File Hash Calculator processes files or filename lists in your browser without uploading them to a server. It uses standard web APIs such as Web Crypto, Blob, and string normalization to check hashes, sizes, and cleaned filename plans quickly.

hash = crypto.subtle.digest(algorithm, fileBytes)

How to use

1Choose a file or enter a base value.
2Press calculate or clean.
3Read the converted values in the result table.

Reference

File Hash Calculator — Browser File Utility Reference
Input	Result
file or filename	calculates SHA-256 and SHA-1 hashes for a file

Sources & standards

MDN Web Docs: Client-side web APIs - MDN Web Docs

FAQ

Is the File Hash Calculator file uploaded to a server?

No. This tool processes files and input in your browser and does not upload them to a server.

Can I use the File Hash Calculator result directly?

Hashes and sizes are browser-calculated values. Filename cleanup is a safe default rule example; adjust it when your organization has a specific naming policy.