Development & APIs

Format query/mutation (graphql). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Tree-view browse and search Swagger JSON. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between Java .properties and JSON. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate EditorConfig from tech stack presets. 100% free, runs locally in your browser—nothing is uploaded to our servers.

General XML validation and indentation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Version validity, ordering, and diff (semver). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Render flowchart/sequence diagram source (mermaid). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Format/beautify Nginx config files. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert docker run command to docker-compose.yml. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Common regex patterns reference. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate fake data like names, emails, addresses. 100% free, runs locally in your browser—nothing is uploaded to our servers.

JS code beautifier/deobfuscator (simple formatting). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert cURL commands to Python/JavaScript/Go/PHP/Java code. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Visual box-shadow editor with multi-layer support and live preview. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Adjust each corner independently with live preview. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Visual Flex property editor with live layout preview. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Linear/radial gradients with adjustable color stops and angle. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Visual keyframes editor with preset animations. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Simulate protanopia, deuteranopia, tritanopia, and achromatopsia. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Decode Base64/Hex protobuf data without schema. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Apache auth file generation, bcrypt/SHA algorithms. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Code syntax highlighted screenshot image. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Generate CSR and private key pair. 100% free, runs locally in your browser—nothing is uploaded to our servers.

HTML/CSS/JS live preview and execution.

Generate ASCII tree text from folder structure.

Convert key-value pairs to variable definitions in various languages.

Drag & drop files to calculate SHA-1/256/512 hash.

Convert between Big-Endian and Little-Endian.

Show original/ones/twos complement for a given integer and bit width.

Generate self-signed SSL key pairs and fingerprints.

Upload .pfx/.p12 file, parse and export certificate & private key PEM. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Send HTTP requests and view response status, headers & body. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Multi-language code formatter for JS/TS/HTML/CSS/JSON/XML/SQL/Python with adjustable indent and wrap. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between px, rem, em, pt, vw, vh and other common CSS length units in real time. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Quick reference for common Git commands, covering basics, branching, remotes, undo, and more. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Paste diff output, highlight added/removed/changed lines, and summarize changes per file. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Parse header/payload as JSON (signature not verified). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Beautify and minify (sql-formatter). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Select and merge common templates. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Gzip, Deflate, Brotli (streaming API). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert 5-field cron expression to human-readable description. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Convert between octal and rwx notation. 100% free, runs locally in your browser—nothing is uploaded to our servers.

CIDR network/broadcast/host range. 100% free, runs locally in your browser—nothing is uploaded to our servers.

CIDR start/end and address count (ip-address). 100% free, runs locally in your browser—nothing is uploaded to our servers.

PEM parse and SHA-256 fingerprint (@peculiar/x509). 100% free, runs locally in your browser—nothing is uploaded to our servers.

Float32/64 hexadecimal with exponent and mantissa. 100% free, runs locally in your browser—nothing is uploaded to our servers.

Binary/octal/decimal/hex and big integers (BigInt). 100% free, runs locally in your browser—nothing is uploaded to our servers.