Small free tools.
One job each, done well.

Describe what you want to match in plain English. Get a regex with tests.

Paste a diff. Get a clean conventional commit message.

Rewrite titles for clarity and click without the clickbait.

Generate algorithm-friendly descriptions with chapters, hashtags, and backend tags.

Turn lecture PDFs into spaced-repetition flashcards.

Read a script aloud in your browser's built-in voices.

Inspect a JSON Web Token. Header, payload, signature.

Pretty-print, minify, and validate JSON. Locally.

MD5, SHA-1, SHA-256 of any string or file. In your browser.

Encode or decode Base64. UTF-8 safe, URL-safe variant. Locally.

Percent-encode URLs and query strings. Component, URI, and form modes.

Upload an image. Get accessible alt text in seconds.

Extract a usable palette from any image you drop in.

Dynamic Open Graph images for blog posts, products, anything. Free tier + API.

Word, character, sentence, paragraph counts plus reading time and Flesch-Kincaid level.

Combine PDFs into one. In your browser. No upload.

Extract pages or split into chunks. Browser only.

Shrink PDFs locally. Tradeoff DPI vs size.

Convert each PDF page to a JPG image. Locally.

Paste any URL — preview how it looks on Twitter, LinkedIn, Slack, Discord. Fix missing tags.