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SHA1 Encrypt & Decrypt
Generate SHA1 hashes from any text instantly. Bulk SHA1 encrypt multiple strings, compare SHA1 hashes, and verify data integrity — 100% in your browser.
MD5 — Weak Security
MD5 has known vulnerabilities and collision attacks. Do not use for passwords or security-critical data. Use SHA256 or SHA512 instead.
What Each Algorithm Is Used For
SHA1 — 160-bit Hash
Produces a 40-character hex string. More bits than MD5 but still has known collision vulnerabilities.
Git Version Control
Git uses SHA1 to identify commits, trees, blobs, and tags. Every Git object has a unique SHA1 hash identifier.
Legacy SSL/TLS
Older SSL certificates used SHA1 signatures. Deprecated by all major browsers and certificate authorities since 2017.
Use SHA256 Instead
For new projects, always use SHA256 or SHA512. SHA1 is only acceptable in legacy systems where upgrade is not possible.
How to Use the EMI / Loan Calculator
SHA1 Pre-Selected
SHA1 algorithm is automatically active. It generates a 160-bit (40 character) hash — commonly seen in Git commits and legacy SSL certificates.
Enter Your Text
Type or paste any string. The SHA1 hash generates instantly in real-time. Even a single character change produces a completely different hash.
Compare SHA1 Hashes
Paste two SHA1 hashes in the comparison tool to instantly verify if they match — useful for checking file integrity or commit verification.
Bulk SHA1 & Export
Switch to Bulk Mode to SHA1-hash multiple strings at once and download all results as a CSV file.
Frequently Asked
Questions
1. What is SHA1?
SHA1 (Secure Hash Algorithm 1) is a cryptographic hash function developed by the NSA and published by NIST in 1995. It produces a 160-bit (40 character hexadecimal) hash from any input. SHA1 is widely known from its use in Git version control, older SSL/TLS certificates, and digital signatures.
2. Is SHA1 secure?
SHA1 is considered cryptographically weak. In 2017, Google’s Project Zero demonstrated the first practical SHA1 collision attack (SHAttered). As a result, major browsers and CAs deprecated SHA1 for SSL certificates. Do not use SHA1 for new security-critical applications — use SHA256 or higher.
3. What is SHA1 still used for?
SHA1 is still used in: Git version control (commit and object hashing), some legacy HMAC implementations, older software checksums, and backward-compatible systems. It’s being gradually phased out in favor of SHA256.
4. What is the SHA1 hash length?
A SHA1 hash is always exactly 40 characters long (160 bits / 20 bytes), regardless of the size of the input. This is longer than MD5’s 32 characters, but shorter than SHA256’s 64 characters.
5. Can SHA1 be reversed?
No. SHA1 is a one-way hash function — it cannot be mathematically reversed. Like MD5, common strings can potentially be found in rainbow tables, which is why SHA1 should not be used for password storage. Use bcrypt or Argon2 for passwords.
5. Is my data private?
100% private. All SHA1 hashing runs in your browser using CryptoJS. Nothing is sent to any server. Your text never leaves your device.
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