CodeHelper
Free Developer Tools, Resources, APIs and Courses
No signup, no upload, no tracking. An independent project built to share tools, knowledge, and curated resources with the developer community. Open to everyone, always free.
Everything You Need in One Place
Developer Tools
Privacy first utilities that run entirely in your browser. Format, convert, generate, and more. No account required.
- • Client-side only, no data uploads
- • Formatters, converters, generators
- • CSS, imaging, crypto, SQL & more
External Resources
800+ curated developer resources across 31 categories. Icons, fonts, UI libraries, design tools and more.
- • Hand-picked quality resources
- • Organized by category
- • Free and open-source focused
Public APIs
400+ free public APIs across 78 categories. Filter by auth type, HTTPS, and CORS availability.
- • Development, music, finance & more
- • Advanced filtering options
- • Detailed API specifications
Articles & Tutorials
In-depth guides, how-tos, and developer insights. Covering AI, hardware, security, energy, science and more.
- • Written by developers
- • AI, hardware, security & more
- • Practical tips and tutorials
Interactive Courses
Hands-on coding courses with built-in exercises. Learn by doing, directly in your browser with instant feedback.
- • Browser-based code playground
- • Progressive difficulty levels
- • No setup required
Product Reviews
Honest, developer-focused reviews of hardware, software, and tools. Tested in real workflows, no sponsored content.
- • Real-world testing
- • Developer-centric perspective
- • No sponsored content
Developer Games
Browser-based arcade games with a developer twist. Built with HTML5 Canvas, no plugins, no downloads.
- • Code Runner (endless runner)
- • Bug Breaker (5 game modes)
- • Dev Space Invaders, Deploy Bird & more
Podcast Player
Discover and listen to tech podcasts powered by PodcastIndex, directly in your browser with a persistent player.
- • Trending & category browsing
- • Save podcasts & bookmark episodes
- • Persistent player across pages
Popular Developer Tools
Byte Size Converter
Convert between Bytes, KB, MB, GB, TB, and PB instantly. Supports both binary (KiB, MiB, GiB) and decimal (SI) units. Free online file size calculator for developers.
Var Dump Formatter
Beautify and format PHP var_dump() output.
Clip Path Maker
Visually create CSS clip-path polygons, circles, and ellipses with draggable handles. Export clean CSS code with modern harmonized UI.
SVG Icon Generator
Create and customize SVG icons with 33+ pre-made shapes, color presets, and export to multiple formats. Import SVG, edit paths, export icon packs.
SVG Wave Generator
Create customizable SVG wave shapes easily.
Chmod Calculator
Calculate Unix/Linux file permissions interactively. Toggle read, write and execute for owner, group and others to get octal, symbolic and chmod command output.
JSON Formatter
Professional JSON formatter with tree view, diff compare, schema validation, and syntax highlighting.
AI Token Counter
Estimate token count and API cost for GPT-4, Claude, Gemini, and Llama models with live counting.
Developer Games
Take a break and play browser games with a developer twist. No downloads, no plugins.
Stack Overflow Survivor
Dodge bugs, errors, and exceptions falling from the sky. How long can you survive? A browser-based arcade game for developers.
Bug Breaker
Break bugs, fix errors, and deploy to production in this developer-themed Breakout game. 5 modes, powerups, and terminal-style HUD.
Code Eater
A developer-themed Snake game. Eat variables, functions, and arrays to grow your codebase. Avoid bugs, memory leaks, and infinite loops.
Dev Space Invaders
Defend your codebase from waves of bugs, viruses and syntax errors in this developer-themed Space Invaders. Shoot them before they reach production.
Deploy Bird
Flap your deploy through the firewalls without crashing. A one-tap browser arcade game for developers, built with Canvas 2D and zero dependencies.
Code Runner
Outrun null, undefined, NaN and runtime bugs in this endless runner for developers. Jump the obstacles, go the distance, built with Canvas 2D and zero dependencies.
Stay in the Loop
New tools, articles, courses and reviews are published regularly. Join the community to get notified the moment something new drops.
Listen while you work
Browse trending tech podcasts powered by PodcastIndex. Search by category, bookmark episodes for later, and listen directly in the browser with a player that follows you across every page.
Featured Resources
Colors
From Coolors and Adobe Color to Khroma and Color Hunt, this collection covers every stage of working with color: palette generation, CSS gradients, accessibility contrast checking, and brand color lookup.
63 resourcesIcons
Whether you need a crisp SVG set like Heroicons or Phosphor Icons, a massive searchable library like Iconify, or animated icons from Lordicon, this collection has you covered for any project.
51 resourcesReact UI Libraries
From the polished accessibility of Chakra UI and Mantine to the enterprise-scale of Ant Design and Material UI, this collection covers every tier of React component library, including Radix UI for headless primitives.
59 resourcesCSS Frameworks
Tailwind CSS and Bootstrap lead the pack, but there is plenty here for every style: the lightweight simplicity of Bulma, the semantic clarity of Foundation, and novelty picks like 98.css and NES CSS.
59 resourcesLatest Articles & Tutorials
Insights, guides, and best practices for developers
Bending Spoons: The Italian Company That Buys What Silicon Valley Built
Four Italian engineers watched their first startup die, kept the last 40,000 dollars, and built Bending Spoons: a Milan company that hires 0.04 percent of applicants, owns Evernote, Vimeo, WeTransfer and AOL, and listed on the Nasdaq at 18 billion dollars. The story, the talent strategy built on Italian salaries, and what the model teaches developers about luck and skill.
CSS Clip-Path: 10 Copy-Paste Examples with Live Previews
Ten production-ready CSS clip-path examples with live previews and copy-paste code: triangles, hexagons, diagonal hero sections, notched cards, speech bubbles, animated circle reveals and polygon morphing. Plus browser support notes, the clip-path vs mask question, and when an SVG wave is the better tool.
Ambient or Optional: A Note on the Two Ways We Have Quietly Chosen to Live with AI in 2026
Did you choose the AI in your operating system, or did it choose you? DuckDuckGo iOS installs peaked at 69.9 percent week over week. Microsoft banned the word Microslop from its own Discord. Apple shipped a record iPhone quarter with a 3 billion parameter model running locally. Three signals, one question worth asking out loud in 2026.
When the Robot Asks for Your Bank Login: A Note on How Fast We Started Trusting
OpenAI just connected ChatGPT to thousands of banks through Plaid, and most people reacted with enthusiasm. A reflection on how quickly we dropped the suspicion we once had for any service asking for our financial data, what we still do not know about how it is handled, and why a friendly conversational interface is not the same as a friend.
Writing for a Generation That Watches: A Conversation About the Slow Death of the Blog
A conversation with digital artist Massimo Larossa about why blogs are losing the new generation, how short form video and headline first news are reshaping attention, and what this means for how a society absorbs information when scrolling replaces reading.
19 Million French IDs Stolen. The Next Email From Your Bank Could Be Real and Still Be a Scam
France just confirmed a massive data breach at ANTS, the agency that issues passports and national IDs. A hacker is selling up to 19 million records on the dark web. Names, addresses, birthdays, emails, phone numbers, all exposed. The next email that looks like your bank might be real, and still be a scam. What was stolen and what to do.
Privacy-First Philosophy
Every tool runs entirely in your browser. No accounts, no tracking, no server uploads. Your data never leaves your machine.
Client-side processing means instant results and complete privacy by design.