Everything you need
to build faster.
A collection of free, simple, and powerful developer tools. Format, convert, generate, and validate—all in one place.
No signup. Your work stays in your browser.
Popular tools
The everyday essentials, ready when you are.
JSON Formatter & Validator
Beautify, minify, and validate JSON with useful errors.
JSON & DataUUID Generator
Generate one or many cryptographically random UUIDs.
GeneratorsPassword Generator
Create secure passwords with adjustable options.
GeneratorsBase64 Encoder / Decoder
Encode and decode Unicode text with Base64.
Encoders & ConvertersCSS Gradient Generator
Design linear or radial gradients and copy the CSS.
Frontend & CSSRegex Tester
Test regular expressions and inspect captured groups.
Backend & APIAll developer tools
28 tools across five focused categories.
JSON & Data
Shape, inspect, and move structured data.JSON Formatter & Validator
Beautify, minify, and validate JSON with useful errors.
JSON & DataJSON to TypeScript
Turn JSON into types and interfaces, including nested data.
JSON & DataJSON to CSV
Convert arrays of objects into spreadsheet-ready CSV.
JSON & DataJSON Diff Checker
Find values that were added, removed, or changed.
JSON & DataCSV to JSON
Parse quoted CSV into structured JSON.
JSON & DataGenerators
Create useful values in seconds.UUID Generator
Generate one or many cryptographically random UUIDs.
GeneratorsPassword Generator
Create secure passwords with adjustable options.
GeneratorsLorem Ipsum Generator
Generate placeholder words, sentences, or paragraphs.
GeneratorsSlug Generator
Make URL-friendly slugs from headings and names.
GeneratorsFake Data Generator
Create fictional users, products, and addresses.
GeneratorsHash Generator
Calculate SHA-256, SHA-384, or SHA-512 hashes locally.
GeneratorsEncoders & Converters
Translate formats safely in your browser.Base64 Encoder / Decoder
Encode and decode Unicode text with Base64.
Encoders & ConvertersURL Encoder / Decoder
Safely encode or decode URL components.
Encoders & ConvertersJWT Decoder
Inspect JWT claims and expiration without sending the token.
Encoders & ConvertersUnix Timestamp Converter
Convert epoch seconds or milliseconds to dates.
Encoders & ConvertersHTML Entity Converter
Encode special characters or decode HTML entities.
Encoders & ConvertersColor Converter
Convert HEX, RGB, and HSL with a live color swatch.
Encoders & ConvertersFrontend & CSS
Build and fine-tune visual interfaces.CSS Gradient Generator
Design linear or radial gradients and copy the CSS.
Frontend & CSSBox Shadow Generator
Tune shadows visually and copy the CSS.
Frontend & CSSBorder Radius Generator
Set each corner radius with a live preview.
Frontend & CSSColor Palette Generator
Create coordinated shades from a base color.
Frontend & CSSCSS Grid Generator
Adjust rows, columns, and gaps, then copy layout code.
Frontend & CSSSVG Optimizer
Reduce SVG markup and download the optimized result.
Frontend & CSSBackend & API
Test requests, patterns, and protocols.Regex Tester
Test regular expressions and inspect captured groups.
Backend & APICron Expression Generator
Build five-field schedules and inspect upcoming runs.
Backend & APIHTTP Status Code Reference
Search status codes and understand common responses.
Backend & APISQL Formatter
Format queries for common SQL dialects without executing them.
Backend & APIAPI Request Builder
Send browser-based HTTP requests and inspect responses.
Backend & APIFind your flow
Shape, inspect, and move structured data.
GeneratorsCreate useful values in seconds.
Encoders & ConvertersTranslate formats safely in your browser.
Frontend & CSSBuild and fine-tune visual interfaces.
Backend & APITest requests, patterns, and protocols.
Webhook Tester
Secure webhook receiving is planned for a future release.