Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
BLAKE3 Hash Generator
Generate BLAKE3 cryptographic hash digests from text or hex. Supports keyed hashing mode.
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What is BLAKE3?
BLAKE3 is a cryptographic hash function that is faster than MD5, SHA-1, SHA-2, and SHA-3, while being more secure than MD5 and SHA-1. It was designed by Jack O'Connor, Jean-Philippe Aumasson, Samuel Neves, and Zooko Wilcox-O'Hearn.
Key features include: extreme performance (10x faster than SHA-256), parallel processing capability, support for keyed hashing (PRF mode), extendable output (XOF), and built-in support for incremental updates. BLAKE3 is suitable for both hashing and message authentication.
How to Use
- Enter Text — Type or paste the text you want to hash in the input area. You can also switch to hex input format.
- Configure Output — Select the output length in bytes (32 = 256-bit default, 64 = 512-bit, or shorter).
- Enable Keyed Mode (optional) — Check "Enable keyed hashing" and provide a 32-byte hex key for authenticated hashing (PRF mode).
- Generate — Click "Generate Hash" or use the example button to see BLAKE3 in action.
- Copy Results — Copy the hex hash or Base64 representation using the copy buttons.
Frequently Asked Questions
How does BLAKE3 compare to SHA-256?
BLAKE3 is approximately 10x faster than SHA-256 on large inputs, supports parallel hashing via SIMD and multithreading, and provides the same 256-bit security level. Unlike SHA-256, BLAKE3 also supports keyed hashing and extendable output (arbitrary output length).
What is keyed hashing mode?
Keyed hashing mode (PRF - Pseudo-Random Function) uses a secret key alongside the input to produce a hash. This is useful for message authentication — only someone with the same key can verify the hash. BLAKE3's keyed mode requires a 32-byte (256-bit) key.
What output lengths are supported?
BLAKE3 supports any output length from 1 byte up to 264-1 bytes (XOF - Extendable Output Function). The default is 32 bytes (256 bits). This tool provides 32, 64, 16, and 8 byte options for convenience.
Is my data stored?
No. Everything runs entirely in your browser. Your data is never sent to any server.
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