All tools

Trim, deduplicate, sort and renumber lines of text or CSV. Drag a file in or paste it — the file is read in the browser and never uploaded.

Turn a CSV with a header row into an array of objects, or go the other way. Quoted fields and embedded commas are handled correctly.

Word, character, sentence and paragraph counts, reading and speaking time, plus the ten most frequent keywords and their density.

Validate, prettify, minify or sort keys. Invalid JSON gets a specific error rather than a silent failure.

Paste two versions and see exactly what changed — added lines in green, removed in red, unchanged in grey.

Encode text to Base64 or decode it back. UTF-8 safe in both directions, and your input never leaves the page.

Percent-encode special characters for use in URLs, or decode an encoded URL back to something readable.

Decode and inspect a JSON Web Token's header, payload and expiry. The token stays in this page — it is never sent anywhere.

SHA-1, SHA-256, SHA-384 and SHA-512, computed with the browser's own SubtleCrypto API.

Live preview on one side, clean HTML source on the other. Headings, emphasis, links, lists, tables, blockquotes and code.

Every case transformation in one place, plus reverse, strip numbers and strip punctuation. Each one shows a worked example before you apply it.

Convert a title into a clean, readable URL slug. Accents are folded, punctuation dropped, spacing normalised.

Convert between HEX, RGB, HSL and CMYK, pick visually, and generate a shade ramp from any starting colour.

Convert between binary, octal, decimal and hexadecimal. Type in any field and the others update as you go.

Generate a QR code for a URL, plain text, email address, phone number or WiFi network, and download it as a PNG.

Generate cryptographically random v4 UUIDs in bulk, in the format your system expects.

Generate placeholder text by paragraphs, sentences or words, in classic Latin or randomised form.

Test a pattern against text as you type, with matches highlighted, capture groups listed and a live replace preview.

Measure a password's real entropy and time-to-crack against four realistic attackers. The password never leaves the page.