Small tools for everyday dev work
Free, fast and private — everything runs in your browser.
Formatters
- JSON FormatterFormat, validate and minify JSON with clear error locations.
- JSON RepairFix broken JSON: quotes, trailing commas, comments and truncated LLM output.
- SQL FormatterFormat and beautify SQL code for dialects such as PostgreSQL and MySQL.
- HTML FormatterFormat and beautify HTML code with Prettier.
- CSS FormatterFormat and beautify CSS code with Prettier.
- JavaScript FormatterFormat and beautify JavaScript code with Prettier.
Encoders & Decoders
Generators
- UUID GeneratorGenerate random v4 and time-ordered v7 UUIDs.
- Hash GeneratorCompute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text.
- Password & Secret GeneratorGenerate strong passwords, API keys, random secrets and nanoids.
- QR Code GeneratorCreate QR codes for text and URLs and download them as PNG or SVG.
Converters
- Unix Timestamp ConverterConvert Unix timestamps to dates and back.
- JSON to YAML ConverterConvert JSON to YAML as you type.
- YAML to JSON ConverterConvert YAML to JSON as you type.
- JSON to CSV ConverterConvert JSON to CSV as you type.
- CSV to JSON ConverterConvert CSV to JSON as you type.
- JSON to XML ConverterConvert JSON to XML as you type.
- XML to JSON ConverterConvert XML to JSON as you type.
- Properties to YAML ConverterConvert application.properties to application.yaml for Spring Boot and Quarkus.
- YAML to Properties ConverterConvert application.yaml to application.properties for Spring Boot and Quarkus.
- Number Base ConverterConvert numbers between binary, octal, decimal and hexadecimal.
- Color ConverterConvert colors between HEX, RGB, HSL and OKLCH with a picker.
- Cron Expression ParserExplain a cron expression in plain English and list its next run times.
Text
- Diff CheckerCompare two texts and see added, removed and unchanged lines.
- Regex TesterTest JavaScript regular expressions with live match highlighting.
- Case ConverterSwitch text between camelCase, snake_case, kebab-case and more.
- Word & Character CounterCount words, characters, lines and sentences, with reading time.
- LLM Token CounterCount GPT tokens with the o200k_base and cl100k_base tokenizers.
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