100+ Free Developer Tools
Format JSON, encode Base64, test regex, generate passwords, convert colors, and much more. Everything runs in your browser - fast, private, no signup.
Popular Tools
JSON Formatter & Validator
Format, validate, and beautify JSON instantly in your browser. Supports syntax highlighting, error detection, and tree view.
SQL Formatter
Format and beautify SQL queries for better readability. Supports MySQL, PostgreSQL, SQLite.
Base64 Encode / Decode
Encode text or files to Base64 and decode Base64 strings back to text. Supports Unicode and binary data.
URL Encode / Decode
Encode and decode URLs and query parameters. Handles percent-encoding for safe URL transmission.
JWT Decoder
Decode and inspect JWT tokens. View header, payload, and signature without verification.
UUID / GUID Generator
Generate cryptographically random UUIDs (v4). Bulk generation supported.
Password Generator
Generate strong, secure passwords with custom length and character sets. Includes strength meter.
Lorem Ipsum Generator
Generate placeholder text for designs and mockups. Multiple modes: classic, hipster, corporate.
Hash Generator (MD5, SHA)
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from any text. All processing is local.
QR Code Generator
Generate QR codes for URLs, text, WiFi, vCard, email, and phone. Export as PNG or SVG.
CSS Gradient Generator
Create beautiful CSS gradients visually. Linear, radial, and conic gradients with live preview.
JSON to CSV Converter
Convert JSON arrays to CSV format. Supports nested objects and custom delimiters.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Shows current timestamp.
JSON to TypeScript Interface
Generate TypeScript interfaces from JSON objects automatically.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time.
Text Diff Checker
Compare two texts and highlight differences. Side-by-side and inline diff views.
Regex Tester
Test regular expressions with real-time match highlighting. Supports all JS regex flags.
Color Picker
Pick colors visually with HEX, RGB, HSL output. Includes contrast checker and palette builder.
Flexbox Playground
Interactive CSS Flexbox builder with live preview and generated code.
IP Address Lookup
Look up your public IP address and geolocation info.
XML Sitemap Generator
Generate an XML sitemap from a list of URLs for search engines like Google and Bing.
Schema / JSON-LD Generator
Create structured data for Articles, FAQ, Products, and Breadcrumbs using JSON-LD format.
SERP Preview Tool
Visualize how your page title and meta description will appear in Google search results.
Percentage Calculator
Calculate percentages, percentage change, and percentage of total. Multiple modes.
Unit Converter
Convert between units of length, weight, temperature, speed, area, volume, and more.
JSON Validator
Validate JSON online with instant syntax error detection, line-aware feedback, and browser-based privacy.
JSON Editor
Edit JSON online with instant validation, formatting, and a clean browser-based workflow for APIs and config files.
JWT Parser
Parse JWT tokens online and inspect the header, payload, claims, and expiration fields instantly.
JSON to JSON Schema
Generate JSON Schema from sample JSON to document payloads, validate APIs, and improve contracts.
JSON Schema Validator
Validate JSON data against JSON Schema definitions online for APIs, forms, and event payloads.
Epoch Converter
Convert Unix epoch timestamps to readable dates and back, with UTC and local time support.
UTC Converter
Convert UTC dates and timestamps into readable formats for debugging APIs, logs, and scheduled jobs.
Timezone Converter
Convert times across time zones for launches, cron jobs, remote teams, and incident coordination.
cURL to Fetch
Convert cURL commands into Fetch API code for browser apps, Next.js routes, and frontend debugging.
cURL to Python
Convert cURL commands into Python requests code to speed up backend scripting and API testing.
Markdown Editor
Write and edit Markdown online with a fast preview workflow for docs, README files, and notes.
Image Compressor
Compress images online to reduce file size for websites, blog posts, and faster page loads.
Regex Cheat Sheet
Quick regular expression cheat sheet with common patterns, character classes, and testing workflow.
Browse by Category
Formatters & Beautifiers
Format, validate, and beautify code and data
23 tools โEncoders & Decoders
Encode and decode data in various formats
9 tools โGenerators
Generate UUIDs, passwords, QR codes, and more
17 tools โConverters
Convert between data formats and units
22 tools โText Tools
Manipulate, analyze, and transform text
13 tools โImage & Color Tools
Work with images and colors
7 tools โCSS Tools
Visual CSS builders and playgrounds
3 tools โNetwork & Web
HTTP, IP, and web utilities
5 tools โSEO Tools
Search engine optimization and analysis utilities
9 tools โMath & Calculators
Calculations and unit conversions
6 tools โJSON Tools
JSON validators, editors, schema tools, converters, and formatting utilities
12 tools โMarkdown Tools
Markdown editors, previews, conversion tools, and export workflows
6 tools โTime & Date Tools
Epoch, UTC, timezone, and cron utilities for developers and operations teams
5 tools โDeveloper Converters
Popular developer-focused converters for JSON, cURL, YAML, SQL, and typed interfaces
11 tools โText Formatting Tools
Text cleanup, HTML and Markdown transforms, diffs, and string formatting helpers
10 tools โWeb Dev Tools
Web development utilities for cURL conversion, CSS, HTML, headers, and frontend workflows
10 tools โSecurity Tools
JWT, Base64, decoding, and security-adjacent debugging utilities for developers
7 tools โAll Tools A-Z
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