Developer Utilities
SHA-256 text & file checksum
Hash entered UTF-8 text or exact local file bytes with Web Crypto, up to 1 MiB. A checksum checks content changes; it is not a digital signature.
SHA-256 hashes the exact raw bytes of a file, or the UTF-8 bytes of entered text. Spaces and line endings affect the digest. Maximum 1 MiB. A checksum detects a changed value; it is not a digital signature or proof of the sender.
Worked example: text abc matches the NIST SHA-256 example.
Text and file bytes stay in your browser. The file is read locally; hashing performs no network request or automatic storage.
Related tools
More in this category
These exist because the underlying problem is real. If the numbers you just put in look uncomfortable, that is usually worth a conversation.
Stay ahead of the integration layer.
Integronauts Signal — practical enterprise integration, API and agentic AI thinking. The tools stay free either way.
Integronauts Signal is launching soon.
Practical enterprise integration, APIs, agentic AI and emerging architecture. Sign-up opens when the list does — nothing to enter yet.