Developer Tools
29 tools
The everyday desk tools of a working developer: format and convert JSON, YAML, CSV and XML, decode tokens, hash and generate identifiers, test a regular expression. Nothing you paste is transmitted, so production payloads are safe here.
- Payloads stay local
- Exact error positions
- No rate limits
tool-genie — developer tools
json-tools
- JSON FormatterBeautify, validate and minify JSON.
- JSON to CSVTurn a JSON array into a CSV table.
- CSV to JSONTurn CSV rows into a JSON array.
- JSON to YAMLConvert JSON into readable YAML.
- YAML to JSONConvert YAML config into JSON.
- CSV to ExcelTurn CSV data into a proper XLSX spreadsheet.
- Excel to CSVExport Excel sheets as clean CSV files.
- CSV to MarkdownTurn CSV data into a formatted Markdown table.
formatters
encode-&-decode
dev-utilities
- JWT DecoderDecode and inspect a JWT.
- UUID GeneratorGenerate UUID v4 and v7 in bulk.
- Hash GeneratorHash text or files with MD5 and SHA.
- Timestamp ConverterConvert Unix time to dates and back.
- Cron Expression GeneratorBuild and explain cron schedules.
- Regex TesterTest and debug regular expressions.
- Number Base ConverterConvert between binary, hex and decimal.
- Color ConverterConvert HEX, RGB, HSL and CMYK.
- Text Diff CheckerCompare two texts line by line.
- Slug GeneratorCreate SEO-friendly URL slugs.
- UTM BuilderTag any URL with UTM campaign parameters.
Frequently Asked Questions
Is it safe to paste production data?
The parsing runs entirely in your browser with no request to any server, so API responses, tokens and customer records never leave the machine you are sitting at.
How large a document can I process?
Files of several megabytes are handled instantly. Past roughly 20 MB you are limited only by the memory the browser tab can hold.
Which JSON, YAML and regex flavours are supported?
Standard JSON, a practical YAML subset covering nested maps, sequences and comments, and JavaScript regular expressions — the same engine Node.js and every browser use.