Are files uploaded to a server to compute the hash?

Web Crypto Hash & Checksum

Security & Privacy

Generate cryptographic hash digests and verify file integrity checksums using browser-native Web Crypto SubtleCrypto. Hash text strings or large files directly on your device.

100% Client-Side

Input Text StringUppercase Hex Format

SHA-256(256 bits)

Computing...

SHA-512(512 bits)

Computing...

SHA-384(384 bits)

Computing...

SHA-1 (Legacy)(160 bits)

Computing...

Zero-Knowledge Privacy Guarantee

This Web Crypto Hash & Checksum executes 100% locally in your browser’s JavaScript memory using client-side Web APIs. No inputs, keys, tokens, files, or outputs are ever uploaded to any server or logged in any database.

Key Features & Capabilities

Hardware-accelerated SubtleCrypto hashing (SHA-256, SHA-512, SHA-384, SHA-1)
Text string and file checksum hashing
HMAC secret key hashing support
Compare mode: verify against expected hash with match indicator

How to Use This Tool

1Select Text or File mode.
2Enter text or select a file to compute the hash digest.
3View hashes in Hexadecimal or Base64 format.
4Paste an expected hash in the comparison box to verify integrity.

Frequently Asked Questions (FAQ)

No. Files are read locally into browser memory using the FileReader API and hashed with Web Crypto SubtleCrypto. No data leaves your machine.

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