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Generate SHA-1 digests from text or uploaded files for legacy compatibility. SHA-1 is not suitable for new security-sensitive uses.
Runs in your browser — your input is processed on this device and never uploaded.
Secondary information and sharing actions for this public tool.
Generate a SHA-1 digest for each text value or uploaded file. The result includes the raw 20-byte digest and its 40-character lowercase hexadecimal form.
SHA-1 is a legacy cryptographic hash with broken collision resistance. NIST deprecated SHA-1 in 2011, disallowed it for digital signatures after 2013, and is transitioning away from its remaining uses. Use SHA-1 only when an existing format or system specifically requires it—not for new signatures, certificates, password storage, or other security-sensitive designs.
For new general-purpose hashing, consider BLAKE3, SHA3, BLAKE2b, or BLAKE2s.
SHA-1 always produces a 160-bit digest, regardless of input size. Hashing is one-way; it is not encryption and cannot be decoded back to the original input.
Drag a file here, or click to upload.
Up to 5 files · 60 MB total
Upload is optional.