Hash a File Without Uploading — SHA-256 in Browser
Verifying file integrity requires computing a hash of the file. Tools that upload the file to compute a hash on a server introduce an unnecessary transmission risk, particularly for sensitive files. This tool uses the Web Crypto API inside your browser to compute SHA-256, SHA-512, or SHA-1 checksums without any file upload.
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File hashing uses the Web Crypto API in your browser — your file bytes are never transmitted to any server.
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File Checksum Verifier →
Free · No upload · No account required
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Frequently Asked Questions
- What hash algorithms are supported?
- SHA-256, SHA-512, and SHA-1 are supported via the Web Crypto API.
- How do I verify a downloaded file's integrity?
- Compute the hash of the downloaded file using this tool, then compare it to the hash published by the software's official source. If they match, the file is intact and unmodified.
- Is there a file size limit?
- No server-side limit applies. The tool reads the file into browser memory, so very large files may be constrained by available RAM.