All Tools
21 free online tools in 6 categories. Every one runs entirely in your browser, so what you type never leaves your device.
Formatters & Viewers
- JSON Formatter & ValidatorFormat, minify and validate JSON online with line-accurate error messages.
- JSON DiffCompare two JSON documents and see every added, removed and changed value by path.
- HTML ViewerPaste HTML and see a live preview at mobile, tablet or desktop width, with scripts off until you allow them.
Encoders & Decoders
- Base64 Encode / DecodeBase64 encode and decode text with full UTF-8 and URL-safe support.
- JWT DecoderDecode a JWT and inspect its header, payload and expiry in your browser.
- URL Encode / DecodePercent-encode and decode text and URLs, and break a URL into its parts.
Converters
- Unix Timestamp ConverterConvert Unix timestamps to dates and back, in any timezone.
- CSV to JSON & JSON to CSVConvert CSV to JSON and JSON to CSV with delimiter detection and nested JSON flattening.
- Color ConverterConvert colors between HEX, RGB, HSL, HWB, HSV, CMYK and OKLCH, with a WCAG contrast checker.
- YAML to JSON & JSON to YAMLConvert YAML to JSON and JSON to YAML with error positions, expanded anchors and multi-document support.
Generators
- UUID GeneratorGenerate UUID v4 and v7 in bulk, and validate any UUID.
- Hash GeneratorGenerate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text and files.
- Password GeneratorCreate strong random passwords and memorable passphrases with a strength meter.
- Lorem Ipsum GeneratorGenerate lorem ipsum placeholder text by paragraphs, sentences, words or characters.
Text Tools
- Regex TesterTest regular expressions online with live match highlighting and groups.
- Case ConverterConvert text to camelCase, snake_case, kebab-case and more.
- Text Diff CheckerCompare two texts online and see added and removed lines side by side.
- Word CounterCount words, characters, sentences and paragraphs, with reading time, keyword density and a length limit.
Calculators
- Tip CalculatorWork out the tip and total on a bill and split it between people, with optional rounding.
- Loan EMI CalculatorWork out the EMI, total interest and payment schedule for a loan, with extra payments and weekly or bi-weekly options.
- Compound Interest CalculatorSee how savings grow with compound interest and regular deposits, with a growth chart and year-by-year table.
Can't find what you need? Request a tool.