Free Text & Code Tools
Free browser tools for cleaning up, converting, and inspecting text and code. Format and validate JSON with exact error positions, count words and characters, switch text between cases, and encode or decode Base64 and URLs. For developers there's a JWT decoder, a cron expression parser, a hash generator, a regex tester with a plain-English pattern breakdown, a Markdown previewer, and a diff checker with word-level highlighting. Every tool on this page runs 100% in your browser — nothing you paste is uploaded, stored, or logged, so it's safe to work with API responses, tokens, and config that contain secrets. No sign-up, no install: open a tool and start typing, and the result updates as you go.
- JSON Formatter & ValidatorPretty-print, minify, and validate JSON instantly.
- JSON to TypeScript ConverterGenerate TS interfaces from any JSON.
- Word & Character CounterCount words, characters, and reading time.
- Text Case ConverterUPPER, lower, Title, camelCase & more.
- Base64 Encode / DecodeEncode and decode Base64, UTF-8 safe.
- URL Encoder / DecoderPercent-encode and decode URLs.
- Hash GeneratorMD5, SHA-1, SHA-256 checksums.
- JWT DecoderDecode JWT header and payload claims.
- Cron Expression ParserExplain cron and preview next runs.
- Markdown PreviewerLive-render Markdown as you type.
- Regex TesterTest regex with live matches & explanation.
- Diff CheckerCompare two texts and see the differences.
- Line Sorter & Duplicate RemoverSort lines A–Z and remove duplicates.
- HTML Entity Encoder / DecoderEscape HTML, JSON & JS strings both ways.
- Chmod CalculatorOctal ↔ rwx permissions + chmod command.
- SQL FormatterFormat SQL for 8 dialects, in your browser.
- Subnet Calculator (IPv4 / CIDR)Network, broadcast, hosts from IP + prefix.