Free Online Developer Tools & Resources
Explore 49+ free online tools for text processing, code formatting, network testing, and developer utilities — all running 100% in your browser.
Text Tools
Free online text formatting and processing tools.
Word Counter
Count words, characters, sentences and paragraphs instantly.
Case Converter
Convert text between uppercase, lowercase, title case, and more.
Text Repeater
Repeat text or words multiple times quickly and easily.
Lorem Ipsum Generator
Generate dummy placeholder text for your designs and layouts.
Markdown Converter
Convert Markdown syntax to clean HTML instantly.
Text Diff / Compare
Compare two pieces of text to find differences and similarities.
Slug Generator
Convert any text or title into a clean, SEO-friendly URL slug.
Text to HTML Converter
Convert plain text with line breaks into properly formatted HTML code.
Unicode Text Converter
Transform text into fancy Unicode fonts for social media and bios.
Upside Down Text Generator
Flip your text upside down using Unicode characters. Copy and paste upside down text anywhere — social media, messages, usernames.
Cursed Text Generator
Generate cursed, glitchy, zalgo text using Unicode combining marks. Copy and paste creepy corrupted text for Discord, social media, and gaming.
Bold Text Generator
Generate bold, italic, and fancy Unicode text styles. Copy and paste bold text for Instagram, Facebook, LinkedIn, Discord, and more.
Strikethrough Text Generator
Generate strikethrough, crossed out, and line-through text using Unicode. Copy and paste strikethrough text for Discord, social media, and more.
Small Text Generator
Generate superscript, subscript, and small caps text using Unicode. Copy and paste tiny text for Instagram, Discord, gaming usernames, and more.
Italics Generator
Generate italic, bold italic, script, and fancy Unicode text styles. Copy and paste italic text for Instagram, Discord, Twitter/X, and more.
Backwards Text Generator
Reverse, mirror, and flip text instantly. Generate backwards text, reversed words, mirror text, and upside-down reversed text. Copy and paste for social media, pranks, and puzzles.
Developer Tools
Essential utilities for developers and programmers.
JSON Formatter
Format, beautify, validate and convert JSON data with syntax highlighting, tree view, and auto-fix.
Base64 Encoder / Decoder
Encode text to Base64 format or decode from it.
URL Encoder / Decoder
Safely encode URL components or decode URL-encoded strings.
UUID / GUID Generator
Generate random UUIDs (Universally Unique Identifiers) instantly.
HTML Minifier
Compress HTML code by removing whitespace and comments.
JWT Decoder
Decode JSON Web Tokens and view header and payload data.
Mermaid Diagram Converter
Render Mermaid diagram code into downloadable PNG or SVG images.
Unit Converter
Convert between all units: length, weight, temperature, data, speed, time, volume, and more.
Color Code Converter
Convert and pick colors between HEX, RGB, HSL, and CMYK formats.
Regex Tester
Test and debug regular expressions in real-time with match highlighting.
Chmod Calculator
Visually calculate Linux file permissions and generate the chmod command.
Markdown Table Generator
Build markdown tables visually with alignment, CSV import, and live preview.
Random String Generator
Generate cryptographically secure random strings, passwords, API keys, and tokens with customizable length and character sets.
Gitignore Generator
Build a .gitignore file by selecting languages, frameworks, IDEs, and OSes. Combines patterns, deduplicates, and downloads instantly.
Code Share
Share code snippets online with syntax highlighting and short URLs.
URL Shortener
Shorten long URLs into clean, shareable short links with QR codes.
Network Tools
Test your connection speed, check your IP address, and analyze network performance.
JSON Tools
Free online JSON formatting, escaping, and data transformation tools for developers.
JSON Escape
Escape special characters in JSON strings online. Convert raw text to valid JSON string format instantly.
JSON Unescape
Unescape JSON strings online. Convert escaped JSON text back to readable format instantly.
JSON Minifier
Minify and compress JSON by removing all whitespace, newlines, and indentation. Reduce JSON file size instantly with real-time compression stats.
JSON Compare
Compare two JSON objects side by side and find every difference. Visual tree diff and text diff views with additions, deletions, and modifications highlighted.
JSON to CSV Converter
Convert JSON arrays to CSV format instantly. Supports nested objects, custom delimiters, and file download.
CSV to JSON Converter
Convert CSV data to JSON format instantly. Auto-detects delimiters, parses types, and supports file upload.
JSON to YAML Converter
Convert JSON to YAML and YAML to JSON online. Bidirectional converter with indent options, inline arrays, and instant download.
XML to JSON Converter
Convert XML to JSON and JSON to XML online. Bidirectional converter with attribute handling, array detection, and file download.
JSON Schema Generator
Generate JSON Schema from any JSON data. Auto-detects types, formats, required fields, and supports Draft 2020-12 and Draft-07.
YAML Formatter
Format, validate, and minify YAML online. Catches indentation errors, tabs, and syntax mistakes with line-precise feedback.
CSS Tools
Free online CSS and design tools for developers and designers. Convert between px, rem, em, inches, and more — all running 100% in your browser.
Pixels to Inches Converter
Convert pixels to inches, centimeters, millimeters, and points at any DPI. Includes inches to pixels conversion and a precomputed reference table.
Px to Rem Converter
Convert between px, rem, and em CSS units with a configurable base font size. Includes a reference table for common conversions and one-click copy.
Math Tools
Free online math calculators and converters for business, science, and development. Calculate markup, convert scientific notation, and more — all running 100% in your browser.
Markup Calculator
Calculate markup percentage, margin, selling price, and profit instantly. Free markup vs margin calculator with conversion table and formulas.
Scientific Notation Converter
Convert numbers to and from scientific notation, E notation, and engineering notation. Includes a scientific notation calculator with step-by-step solutions.
Latest Developer Insights
Practical guides, tutorials, and deep dives into the tools and concepts developers use every day.
GPT-5.4 Computer Use: AI That Operates Your Desktop
OpenAI's GPT-5.4 scored 75% on OSWorld — the first AI model to clearly beat human performance at desktop tasks. Here's what developers need to know.
Unicode Text Effects for Social Media: Complete Guide
Learn how Unicode text effects work for Instagram, Discord, Twitter/X, and Facebook. Create bold, italic, cursed, and fancy text that works anywhere.
What Is Agentic AI? The Rise of AI Agents in 2026
Agentic AI is redefining how software operates — autonomous AI agents can now plan, reason, and execute multi-step tasks without human intervention.
Why DevPik?
Built by developers, for developers. Here's why thousands trust DevPik for their daily toolkit.
Privacy First
Every tool processes data locally in your browser. Nothing is sent to any server — your data stays yours.
Lightning Fast
No server round-trips mean instant results. Our tools respond in milliseconds, not seconds.
Free Forever
No premium tiers, no signup walls, no hidden fees. All tools are completely free to use with no limits.
The Ultimate Platform for Free Developer Tools
DevPik is your one-stop destination for free online developer tools, text utilities, and practical tech insights. Whether you're a software developer, content creator, student, or tech professional, our platform provides everything you need to work smarter and more efficiently.
Our collection of free online tools includes essential utilities for text processing — word counters, case converters, markdown converters, and Lorem Ipsum generators. For developers, we offer JSON formatters, regex testers, Base64 encoders, JWT decoders, UUID generators, HTML minifiers, Mermaid diagram converters, unit converters, and color code converters. Our dedicated JSON tools suite includes JSON escape, JSON unescape, and JSON formatting utilities for working with JSON data. Every tool runs 100% client-side with zero data sent to servers, ensuring maximum privacy and speed.
For network and infrastructure work, DevPik provides DNS lookup, IP address tools, and other network utilities that run directly in your browser. Our blog features in-depth tutorials, comparisons, and practical guides covering developer workflows, tooling, and the latest technology trends that matter most to modern professionals.
Join thousands of developers and creators who rely on DevPik as their daily toolkit. All our tools are free forever, require no signup, and prioritize your privacy. Start exploring today and discover why DevPik is the ultimate online toolkit for developers and creators.