Developer Tools

SHA-1 Hash Generator for Text and Files

Generate 160-bit SHA-1 checksums for strings and binary files directly inside your browser via Web Crypto.

100% free
Files stay on your device
No sign-up, no watermark

Input Plaintext

SHA-1 Hex (Lowercase)

Awaiting input...

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What is SHA-1 Hash Generator for Text and Files?

The SHA-1 Hash Generator computes the 160-bit SHA-1 digest of text or of any file you choose, shown as a 40-character hexadecimal string and in Base64. Hashing uses the browser’s native Web Crypto API, so even large files are hashed quickly without uploading them. SHA-1 is still used for Git object IDs and legacy checksums, but it is no longer collision-resistant, so use SHA-256 for security-sensitive purposes.

How to use SHA-1 Hash Generator for Text and Files

1
Choose text or file input
Type text, or switch to File Input to hash a file.
2
Get the hash
The SHA-1 digest appears instantly in hex and Base64.
3
Copy or compare
Copy the hash or compare it with a published checksum.

Frequently asked questions

Is SHA-1 secure?

Not for signatures or certificates — practical collision attacks exist. It remains fine for non-security checksums and compatibility with older systems.

Why does my hash differ from another tool?

Hashes change with any difference in input, including a trailing newline, different line endings or text encoding. This tool hashes UTF-8 text exactly as typed.

Are files uploaded to be hashed?

No. The file is read and hashed locally with Web Crypto.

Last updated: October 13, 2026