# SHA-1 Hash Generator

> Generate a SHA-1 hash from text — 160-bit digest, computed locally.

To generate a SHA-1 hash, paste your text above and the 160-bit digest is produced using the browser's native WebCrypto implementation. SHA-1 is deprecated for security use after practical collisions were demonstrated in 2017, but still appears in Git object IDs.

**URL:** https://convertto.tech/t/sha1-hash-generator
**Category:** Hash & Crypto Tools (https://convertto.tech/c/crypto-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Digest size:** 160 bits
- **Inputs:** Text or any file, hashed locally
- **Verification:** Compare against a published checksum
- **Security:** Cryptographically broken — checksums only
- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Choose the hash.
2. Enter or paste your text to hash.
3. Select your file — the file stays on your device and is never uploaded.
4. Enter or paste your verify against (optional).
5. Turn "Uppercase hex" on or off as needed.
6. Press Run, then download the result when it is ready.

## FAQ

### Why does Git use SHA-1?

Git adopted SHA-1 in 2005 for content addressing, before collisions were practical. Git has since added collision detection and is migrating to SHA-256, but existing repositories still use SHA-1 object IDs.

### How do I verify a downloaded file?

Switch the input to "A file", select your download, and paste the checksum published by the source into the verify box. A match means the content is byte-identical to what they hashed; a mismatch means you should not run it.

### Is my file uploaded to check it?

No. Files are read from disk and hashed in your browser, in chunks, so even very large files never leave your device.

## Related tools

- [MD5 Hash Generator](https://convertto.tech/t/md5-hash-generator): Generate an MD5 hash from any text — instantly and entirely in your browser.
- [SHA-256 Hash Generator](https://convertto.tech/t/sha256-hash-generator): Generate a secure SHA-256 hash from any text, in hex and Base64.
- [SHA-512 Hash Generator](https://convertto.tech/t/sha512-hash-generator): Generate a 512-bit SHA-512 hash — the widest digest in the SHA-2 family.
- [SHA-384 Hash Generator](https://convertto.tech/t/sha384-hash-generator): Generate a SHA-384 hash — a truncated SHA-512 used in TLS cipher suites.
- [File Hash & Checksum Calculator](https://convertto.tech/t/file-hash-calculator): Compute SHA-256, SHA-384, SHA-512 or SHA-1 for any file and verify it against a checksum.
- [Bcrypt Hash Generator](https://convertto.tech/t/bcrypt-hash-generator): Hash a password with bcrypt at a configurable cost factor — the right way to store passwords.
- [CRC32 Checksum Calculator](https://convertto.tech/t/crc32-checksum): Calculate a CRC32 checksum — the fast error-detection code used in ZIP and PNG files.
- [HMAC Generator](https://convertto.tech/t/hmac-generator): Generate an HMAC signature with SHA-256, SHA-1, SHA-384 or SHA-512 and a secret key.