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Useful tools

Small, client-side helpers for links, writing, and developer workflows. No sign-in required.

Link tools

  • UTM builder and parserBuild tracked links or inspect query parameters from a URL.
  • QR code generatorGenerate a QR image from text or a URL.
  • URL encode / decodePercent-encode or decode URL components.
  • Extract linksGrab URLs from prose and dedupe.

Content tools

  • Markdown previewLive preview while you write.
  • Text diffLine-by-line differences between two texts.
  • Slug generatorSEO-friendly path segments from titles.
  • HTML to textStrip tags for plain text.
  • OG previewParse Open Graph tags from HTML.
  • Word countCharacters, words, lines, paragraphs, CJK count.
  • Lorem ipsumRandom multi-paragraph Latin-style filler text.
  • Case and namingUPPER, lower, camelCase, kebab-case, and more.

Developer tools

  • JSON / YAMLFormat JSON or convert between JSON and YAML.
  • Timestamp and zonesUnix ms/s and local time in common time zones.
  • Base64 encode / decodeUTF-8 text and Base64 conversion.
  • Regex testerRun RegExp and list matches.
  • JWT decoderInspect header and payload JSON.
  • UUID generatorRandom UUID v4 in batch.
  • SHA-256Text fingerprint hash.
  • Color contrastWCAG contrast checks.
  • Password generatorLength and charset mix, secure random.
  • Safe colorsWCAG contrast pairs and text-on-bg picks.
  • HTML entitiesEscape or unescape <, >, &, and quotes.
  • AI token calculatorEstimate OpenAI-style tokens by model vocabulary.