Every few weeks a pastebin-sized text file lands on my desk and I need to sort it, kill the duplicate lines, or flip the case. I used to open a random upload-based website — which meant sending data I didn't really want to share to a server I don't know.
So I built a set of line/text utilities that run 100% in your browser. Nothing is uploaded; the file never leaves your machine.
What's in the kit:
- Sort lines — alphabetical, numeric, by length, reverse order, with a dedupe toggle: https://instant-data-converter.vercel.app/tool/sort-lines
- Remove duplicate lines — case-sensitive or not, with optional sorting of the result: https://instant-data-converter.vercel.app/tool/remove-duplicate-lines
- Case converter — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, alternating: https://instant-data-converter.vercel.app/tool/case-converter
- Flip / reverse text — reverse characters, reverse words, or the upside-down Unicode effect: https://instant-data-converter.vercel.app/tool/flip-text
- Remove line breaks — join a wrapped paragraph back into one line, optionally replacing newlines with commas or spaces: https://instant-data-converter.vercel.app/tool/remove-line-breaks
- JSON lint — validate a JSON blob and get the exact line and column of the error plus a fix hint: https://instant-data-converter.vercel.app/tool/json-lint
Why in-browser matters: privacy-first, no sign-up, works offline, and it's instant — no round-trip to a server. For big files the sort and dedupe run on your own CPU.
I keep them alongside the existing data converters (CSV ↔ JSON, JSON ↔ YAML, Base64, word counter) in the same spot, so one paste-in window covers most of my text work: https://instant-data-converter.vercel.app
If you paste messy text into your terminal or editor a lot, these might save you a few minutes every week. Feedback welcome.
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