d4 · tools · hash & encode

Hash & encode.

Digests, encoders and Subresource Integrity in one place: SHA-1 through SHA-512 of any text or file, conversion between Base64, base64url, URL percent-encoding, hex and HTML entities, and ready-to-paste SRI attributes. Everything runs in your browser; nothing you type leaves this page.

Hash

Type or paste text, or choose a file to read locally. Digests are computed with the browser's crypto.subtle and shown as hex and Base64. A file, if chosen, takes priority over the text box.

Text to hash

Or a file (read locally, never uploaded) Hash

Encode / decode

Bidirectional conversion for Base64, base64url, URL percent-encoding, hex and HTML entities. Text is handled as UTF-8, so accents and emoji round-trip correctly.

Input

Transform Base64 (standard) Base64 URL-safe URL percent-encoding Hex HTML entities Direction Encode Decode Convert

Output

Copy output Send output to input

Subresource Integrity

Paste the exact contents of a script or stylesheet, or choose the file, and get the integrity attribute to add to your <script> or <link> tag. A file, if chosen, takes priority over the text box.

Resource contents

Or a file (read locally, never uploaded) Algorithm sha256 sha384 sha512 Generate

The integrity hash must be computed over the exact bytes the browser receives. If the server transforms the response (minification, differing line endings, a byte-order mark), recompute against the delivered file. For cross-origin resources also add crossorigin="anonymous".