SHA-1 Hash Generator

SHA‑1 Hash Generator

Generate a SHA‑1 checksum (160‑bit SHA1 hexdigest) instantly. Use this online SHA‑1 tool to create a 40‑character hexadecimal SHA‑1 hash for any text input — useful for legacy integrity checks, file verification and quick checksum comparisons. Note: SHA‑1 is deprecated for cryptographic security; use SHA‑256 or SHA‑512 for new systems.

How to use

• Paste or type the text you want to hash into the editor.
• Choose Encode → SHA‑1 (or run the SHA‑1 command from the menu).
• Copy the resulting SHA‑1 hexdigest (40‑character lowercase hex) and use it for comparisons or records.

Behavior & output details

• Output format: SHA‑1 produces a 160‑bit digest displayed as a 40‑character lowercase hexadecimal string (the SHA‑1 hexdigest).
• Input handling: The tool hashes the input exactly as provided (no implicit trimming or normalization). Newlines, spaces and punctuation are included in the hashed data.
• Text vs binary: This generator hashes text input. To hash binary data, convert it (for example, to Base64) and then hash the decoded binary where appropriate.
• Use cases: quick SHA‑1 checksum generation, legacy verification, comparing expected vs actual hexdigests, and examples for educational purposes.
• Security note: SHA‑1 is vulnerable to collision attacks and is considered deprecated for security-critical purposes such as password storage, TLS certificates or digital signatures. Prefer SHA‑256 or SHA‑512 for cryptographic security.

Examples (inputs and SHA‑1 hexdigests)

 Input: (empty string) Output: da39a3ee5e6b4b0d3255bfef95601890afd80709

Input: hello Output: aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d

Input: The quick brown fox jumps over the lazy dog Output: 2fd4e1c67a2d28fced849ee1bb76e7391b93eb12 

Longer text examples (useful for SEO-rich samples and integrity checks)

Longer sample inputs are commonly used to include descriptive keywords while testing sha1 generation and comparison workflows. Below are two longer examples you can paste directly into the tool to generate SHA‑1 hashes.

 Input: PicoToolkit SHA-1 test: generate sha1 hash online for legacy checksum verification and quick integrity checks. Output: (paste the above text into the tool to compute its SHA-1 hexdigest)

Input: Sample text for SHA1 generator demonstration — include phrases like "sha1", "sha-1", "generate sha1" to test keyword-rich inputs. Output: (paste the above text into the tool to compute its SHA-1 hexdigest) 

Workflows

• Verify a published checksum: Generate the SHA‑1 hexdigest of your text and compare it to an expected 40‑char hex value to confirm integrity.
• Base64 & SHA‑1: When hashing binary data, decode Base64 to raw bytes first (use the Base64 tool), then compute the SHA‑1 hexdigest of the resulting bytes.
• Switch to stronger hashes: For secure storage or signing use SHA‑256 or SHA‑512 instead of SHA‑1.
• Compare formats: If you need Base64 instead of hex, convert the raw SHA‑1 bytes to Base64 with a binary-aware tool — or compute hex here and convert externally.

Related tools

• MD5: Generate MD5 checksums for compatibility with older systems.
• SHA‑256: Stronger hash for modern cryptographic needs.
• SHA‑512: High‑security hash for sensitive applications.
• Base64 Encoder and Decoder — encode or decode binary data when preparing inputs or converting outputs.
• MD5 Hash Generator — alternate checksum format for legacy workflows.

FAQ

What is the SHA‑1 output format?

The output is a 40‑character lowercase hexadecimal string representing the 160‑bit SHA‑1 digest (the SHA‑1 hexdigest).

Should I use SHA‑1 for passwords or certificates?

No. SHA‑1 is deprecated for cryptographic security due to collision vulnerabilities. Use SHA‑256 or SHA‑512 for password hashing and certificates.

How does whitespace affect the hash?

Whitespace, newlines and punctuation are part of the input and will change the resulting SHA‑1 hexdigest. Hash the exact byte sequence you intend to verify.

Can I hash a file with this tool?

This tool hashes text input. For files, convert or extract the file contents into text or use a file-aware hashing utility that produces SHA‑1 for the raw bytes.