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Formatters & Validators

Format, validate, and inspect structured data

JSON Formatter

Format, validate, minify, and inspect JSON with syntax highlighting and a tree view.

SQL Formatter

Beautify, minify, and syntax-highlight SQL queries. Supports multiple dialects.

Regex Tester

Test regular expressions in real-time with match highlighting, capture groups, and a common patterns library.

JWT Decoder

Decode and inspect JSON Web Tokens. View header, payload, signature, and expiry status.

Cron Expression Parser

Parse and build cron expressions visually. See next run times, plain English description, and cheat sheet.

JSON Path Evaluator

Evaluate JSONPath expressions with live results, tree view, autocomplete, and filter support.

Data Format Viewer

Paste JSON, XML, YAML, CSV, or .env — auto-detect format, view as tree, convert between formats.

JSON Validator

Validate JSON syntax online. Check for errors with line numbers, format, minify, and explore with tree view.

Generators

Generate IDs, passwords, keys, and test data

UUID Generator

Generate UUIDs in all versions — v1, v3, v4, v5, v7, and Nil. Bulk generate with formatting options.

Password Generator

Passwords, passphrases, PINs, RSA/EC/Ed25519 key pairs, salts, SHA hashes, and API secrets.

QR Code Generator

Generate QR codes for URLs, text, WiFi, email, phone, and vCards. Customize colors and download as PNG/SVG.

Lorem Ipsum Generator

Generate placeholder text in multiple styles: classic, hipster, tech, and business. Export as plain text, HTML, or Markdown.

Test Data Generator

Generate realistic fake data for testing: names, emails, addresses, phone numbers, and more.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes. File hashing, HMAC, and checksum verification.

JWT Builder

Create and sign JSON Web Tokens with HMAC-SHA256/384/512. Set claims, expiry, and verify signatures.

MD5 Hash Generator

Generate MD5 hashes from text or files instantly. Includes HMAC support and checksum verification.

SHA-256 Hash Generator

Generate SHA-256 hashes from text or files. Includes file hashing, HMAC generation, and checksum verification.

Converters

Convert between formats, encodings, and units

Timestamp Converter

Convert Unix timestamps to dates across all timezones with multiple output formats.

Base64 Encoder & Decoder

Encode and decode Base64 strings online. Supports text and UTF-8 encoding.

URL Encoder & Decoder

Encode and decode URLs, parse query strings, and build URLs with a visual parameter editor.

Color Converter

Convert between HEX, RGB, HSL with contrast checker, palette generator, and Tailwind CSS matching.

YAML / JSON Converter

Convert between YAML and JSON with validation, sorting, and presets for Docker, Kubernetes, and GitHub Actions.

Markdown to HTML

Convert Markdown to HTML and back. Live preview with GitHub-flavored Markdown support.

JSON to TypeScript

Generate TypeScript interfaces, Zod schemas, or JSON Schema from any JSON. Smart type inference with optional fields.

Number Base Converter

Convert between binary, octal, decimal, and hex. Bit visualization, two's complement, and bitwise operations.

CSV to JSON Converter

Convert CSV to JSON and JSON to CSV instantly. Handles headers, custom delimiters, and large datasets.

Image to Base64

Convert images to Base64 data URIs. Drag & drop, batch upload, resize, and reverse Base64 to image.

Curl to Code

Convert curl commands to Python, JavaScript, Go, Java, PHP, Rust, C#, and Ruby code.

String Escape / Unescape

Escape and unescape strings for JSON, HTML, XML, URL, SQL, regex, shell, Java, Python, and more.

Epoch Converter

Convert Unix epoch timestamps to human-readable dates and back. All timezones, multiple formats, live clock.

Diff & Compare

Compare text, code, and data side-by-side

Text Diff Checker

Compare two texts side-by-side with line and character-level diff highlighting. Unified and split views.

JSON Diff

Compare two JSON objects structurally. See added, removed, and changed values in a tree view.

Web & SEO

HTTP references, meta tags, and web utilities

HTTP Status Codes

Searchable reference for all HTTP status codes with explanations, common causes, and example responses.

HTML Entity Encoder

Encode and decode HTML entities. Searchable reference table with 80+ named, decimal, and hex entities.

Meta Tag Generator

Generate meta tags for SEO, Open Graph, and Twitter Cards with live Google, Facebook, and Twitter previews.

API Tester

Test REST APIs in your browser. Send GET, POST, PUT, DELETE requests with headers, auth, and body.

OG Preview / Debugger

Preview how your page appears on Google, Facebook, Twitter, Slack, Discord, LinkedIn, and WhatsApp.

URL Parser

Parse any URL into its components: protocol, hostname, path, query parameters, and fragment.

DevOps & Config

Unix permissions, system tools, and configuration helpers

Chmod Calculator

Interactive Unix file permission calculator with visual grid, umask calculator, and common presets.

IP Subnet Calculator

Calculate subnet masks, network ranges, broadcast addresses, and divide subnets. IPv4 and IPv6 support.

Docker Run to Compose

Convert docker run commands to docker-compose.yml and back. Supports all common Docker flags.

Git Command Builder

Build complex git commands visually. 18 commands with all options, explanations, and danger warnings.

CSS & Design

Visual CSS generators for gradients, shadows, and more

CSS Gradient Generator

Create beautiful CSS gradients visually. Linear, radial, and conic with color stops, presets, and Tailwind output.

Box Shadow Generator

Design CSS box shadows visually with multiple layers, presets, and live preview.

Favicon Generator

Generate favicons from images, text, or emoji. Download as PNG, ICO, or ZIP with all sizes.

Tailwind CSS Lookup

Look up any Tailwind class to see its CSS. Reverse lookup: paste CSS to find the Tailwind class.

Math & Calculators

Percentage, tip, discount, and margin calculators

Percentage Calculator

Calculate percentages, tips, discounts, margins, and markups. Quick reference table and visual bars.

Text Utilities

Count words, generate text, and transform content

Word & Character Counter

Count words, characters, sentences, and paragraphs. Readability score, keyword density, and case converters.

Case Converter

Convert text between camelCase, snake_case, kebab-case, PascalCase, UPPERCASE, and 15+ other formats.

Line Tools

Join, split, sort, dedupe, filter, number, and transform lines of text. Multi-line to one-line and back.

Slug Generator

Convert titles to URL-friendly slugs with transliteration, custom separators, and bulk mode.

Markdown Table Generator

Visual table editor that outputs Markdown, HTML, CSV, JSON, and ASCII tables. Import from CSV or Excel.

ASCII Art Generator

Convert text to ASCII art with 8 font styles. Copy as code comments for any language.

Reference

Cheat sheets and lookup tables for developers

ASCII Table

Full ASCII character table with decimal, hex, octal, and binary values. Searchable with category filters.

HTML Color Names

All 140+ named CSS colors with swatches, hex, RGB values. Search, sort, and copy.

Regex Cheat Sheet

Searchable regex reference with patterns, examples, and language-specific notes for JS, Python, Go, and Java.

Why DevPrix?

DevPrix Dev Tools is a collection of free, fast, and privacy-focused utilities built for software developers. Every tool runs entirely in your browser — no data is sent to any server.

Format JSON, test regex, decode JWTs, convert timestamps, generate UUIDs, create passwords, and much more — all from one place.

Developer ToolsThat Just Work