Developer Tools that Respect Your Privacy

JSON Formatter

Format, validate, and explore JSON with a collapsible tree view. Runs entirely in your browser.

JSON Validator

Instantly validate JSON syntax, identify errors with exact line and column locations, and fix formatting bugs.

JSON to CSV

Convert JSON arrays and nested objects into clean, downloadable CSV spreadsheets in seconds.

CSV to JSON

Convert CSV tabular data into structured JSON objects or arrays with automatic type detection.

JSON to XML

Convert JSON documents into clean, structured, and customizable XML markup instantly.

XML to JSON

Convert XML documents into readable, valid JSON objects with automatic type parsing and attribute preservation.

XML Formatter

Format, beautify, and validate messy XML files with custom indentation and instant syntax error detection.

SQL Formatter

Format messy SQL into readable, consistently indented queries. Runs entirely in your browser.

HTML Formatter

Clean up unformatted, messy HTML markup into well-indented, readable code with customizable line wrapping.

CSS Beautifier

Format, organize, or minify CSS stylesheets with consistent indentation, selector spacing, and clean rule separation.

JavaScript Beautifier

Format, un-minify, or compact JavaScript & TypeScript code into clean, readable scripts with custom indentation.

YAML to JSON

Convert YAML configuration files into structured JSON documents (or JSON to YAML) instantly.

Base64 Encode & Decode

Encode plain text to Base64 or decode Base64 strings to UTF-8 text with URL-safe encoding and automatic JSON formatting.

JWT Decoder

Decode JSON Web Tokens (JWT) client-side. Inspect header claims, payload data, expiration times, and token signatures.

compare

Diff Checker

Compare two text or code snippets side-by-side to highlight added, removed, and modified lines instantly.

JSON to TypeScript

Generate strongly typed TypeScript interfaces and type aliases from sample JSON documents instantly.

Regex Tester

Test, debug, and validate Regular Expressions in real-time with capturing group extraction and flag controls.

UUID Generator

Generate cryptographically secure random UUID v4 and timestamp-based UUID v7 identifiers in bulk.

Hash Generator

Generate cryptographically secure SHA-256, SHA-512, SHA-1, and MD5 message digests client-side.

Timestamp Converter

Convert Unix epoch seconds and milliseconds to human-readable UTC & Local date-time formats instantly.

URL Encode & Decode

Encode, decode, or parse URL query strings and percent-encoded query parameters instantly.

Markdown to HTML

Convert Markdown documents, tables, lists, and code blocks into clean, formatted HTML markup.

cURL to Code

Convert raw cURL shell commands into clean JavaScript Fetch, Axios, or Python requests code instantly.

Cron Parser

Translate complex cron expressions into human-readable English schedules and validate 5-part and 6-part cron syntax.

Color Converter

Convert between HEX, RGB, RGBA, and HSL color formats with channel breakdowns and CSS variable exports.

JSON Minifier

Compress and minify JSON data by stripping all whitespace and line breaks to minimize payload size.

SQL Minifier

Compress messy SQL queries into single-line statements by removing comments, blank lines, and unnecessary spaces.

HTML to Markdown

Convert HTML markup, tables, lists, and formatted content back into clean, readable Markdown syntax.

TOML to JSON

Convert TOML configuration files (Cargo.toml, pyproject.toml, Wrangler) into structured JSON documents.

Gzip Size Estimator

Measure uncompressed vs Gzip/Brotli compressed byte sizes and bandwidth savings directly in your browser.

JWT Generator

Generate and sign JSON Web Tokens (JWT) using HMAC-SHA256, HMAC-SHA384, or HMAC-SHA512. 100% in-browser Web Crypto security.

CSS Minifier

Compress and minify CSS stylesheets by removing whitespace, line breaks, and comments.

Markdown Table Generator

Convert CSV, TSV, or JSON data into perfectly aligned GitHub-Flavored Markdown tables.

JSON Schema Validator

Validate JSON documents against JSON Schema definitions using Ajv. Path-accurate structural error reports.

QR Code Generator

Generate clean, customizable vector SVG QR codes from URLs, text, Wi-Fi keys, and tokens. 100% in-browser.

URL Parser & Params Builder

Deconstruct URLs into protocol, host, port, path, hash, and structured query parameters with full decoding.

HTML Entity Encoder & Decoder

Convert special characters to named, decimal, or hex HTML entities and decode encoded HTML entities back to raw text.

Number Base & Radix Converter

Convert numbers instantly between Decimal, Binary, Hexadecimal, Octal, and ASCII with bit-length analysis.

SVG Optimizer & CSS Data URI

Strip editor junk, comments, and redundant metadata from SVGs. Convert directly to CSS Data URI or React JSX.

Cron Expression Builder

Assemble and generate 5-part cron schedules from field parameters or text rules with human-readable descriptions.

GraphQL Formatter & Minifier

Format, beautify, validate AST, and minify GraphQL queries, mutations, subscriptions, and SDL schemas.

Base64 Image & Data URI Converter

Convert between raw Base64 strings, Data URIs, HTML <img> tags, and CSS background rules with automatic MIME detection.

Bcrypt Hash Generator & Verifier

Generate secure salted Bcrypt password hashes ($2a$) or verify plaintext passwords against existing hashes locally.

YAML to TOML Converter

Convert configuration files seamlessly between YAML and TOML formats with full data type preservation.

JSONPath & JQ Query Evaluator

Test JSONPath expressions ($.store.book[*].author) against complex JSON payloads with instant match filtering.

Chmod Permissions Calculator

Convert between Linux octal permissions (755, 644, 777) and symbolic notations (rwxr-xr-x) with bit breakdown and security notes.

IP Subnet & CIDR Calculator

Calculate network range, broadcast IP, usable hosts, subnet mask, wildcard mask, and binary breakdown from any CIDR notation.

HTTP Headers & Security Inspector

Parse HTTP headers, audit critical security headers (HSTS, CSP, X-Frame-Options, CORS), and calculate a security grade.

TypeScript to JSON Schema Converter

Convert TypeScript interfaces and type definitions directly to valid Draft-07 JSON Schema specifications.

Regular Expression Generator

Generate battle-tested regular expressions with explanation, flags, test cases, and code snippets in JavaScript, TypeScript, Python, and Go.

OpenAPI Formatter & Validator

Validate OpenAPI 3 and Swagger 2 documents, then format them as readable JSON or YAML.

GraphQL to TypeScript

Generate readable TypeScript interfaces, enums, unions, and scalar types from GraphQL SDL.

Dockerfile Formatter & Linter

Normalize Dockerfile instructions and catch common build mistakes before you ship.

GitHub Actions Workflow Validator

Format workflow YAML and catch missing jobs, runners, triggers, and steps before committing.

.env Formatter & Validator

Normalize environment variables and catch duplicate keys, malformed lines, and unsafe values.

Kubernetes Manifest Validator

Format multi-document Kubernetes YAML and catch missing metadata or workload containers.

.gitignore Generator

Combine curated .gitignore templates for Node, Python, Docker, and more into one deduplicated file.

CSV/TSV Column Aligner

Turn raw CSV or TSV data into a plain-text table with aligned columns, like the Unix `column -t` command.

Certificate & JWK Inspector

Inspect X.509 PEM certificates and JSON Web Keys locally — subject, issuer, SANs, expiry, and key type without uploading.

HAR to cURL / Fetch

Paste a Chrome DevTools HAR export and generate ready-to-run curl, fetch, or axios snippets — entirely in your browser.