All tools

Every OpenSeal tool in one place — 8 free privacy, Unicode, and text utilities that run entirely in your browser.

Privacy

Hide, reveal, and protect information in plain text.

Invisible TextHide a secret message inside ordinary text using invisible characters, optionally encrypted with a passphrase.

Encoding

Convert text between the formats machines expect.

Base64 Encoder / DecoderConvert text to Base64 and back, with full Unicode support and no server round-trip.URL Encoder / DecoderPercent-encode text for safe use in URLs and query strings, or decode it back to plain text.

Formatting

Make structured data readable, or make it small.

JSON Formatter & ValidatorFormat messy JSON into readable indentation, minify it, and get a clear error when it is invalid.

Generators

Produce identifiers, hashes, and placeholder data.

UUID GeneratorGenerate cryptographically random UUID v4 identifiers in bulk, straight from your browser.

Security

Inspect tokens, hashes, and the things that guard your systems.

Hash GeneratorGenerate SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any text, computed in your browser.

Text

Inspect, clean, and manipulate everyday text.

Unicode CleanerStrip invisible characters, fix strange spaces, and normalise messy text back to something clean.Unicode InspectorSee every character in your text, including invisible ones, with codepoints and risk warnings.