Developer Tools

Encode and decode Base64 in your browser, including emoji and non-Latin text.

Format or losslessly minify CSS — whitespace and comments only, values byte-for-byte untouched.

Convert CSV to JSON and back, with delimiter detection and type inference that never invents precision.

SHA-256, SHA-512, SHA-384 and SHA-1 digests, with checksum comparison.

Escape markup so it displays as text, or decode entities back - without ever rendering them.

Format or minify HTML without changing what the page renders — inline whitespace is load-bearing and treated that way.

Format, minify and validate JSON entirely in your browser.

Read the header, claims and expiry of a JWT in your browser. Decodes only — it cannot verify a signature.

Preview GitHub-flavoured Markdown as you type, with sanitised HTML you can copy or download.

Cryptographically secure passwords and hex tokens, with the entropy shown.

Test a regular expression against your text, with every match, group and a warning for catastrophic backtracking.

Format SQL with clause-per-line layout and dialect-aware tokenizing. Layout only — nothing is ever executed.

Compare two texts line by line and see exactly what changed, down to the word.

Convert Unix timestamps to dates and back, in your local time or UTC, with a live clock.

Percent-encode a URL or a single query value, with the difference made explicit.

Turn a title into a clean URL slug, honestly handling non-Latin scripts.

Generate v4 or time-ordered v7 UUIDs, or decode one you already have.

Format, minify and check XML for well-formedness, with every error located in your text.

Validate and format YAML, or convert it to and from JSON, with every error located in your text.