Developer's Toolkit
210+ free developer tools in one place — no ads, no sign-up. Everything runs in your browser.
- Runs in your browser
- No ads, privacy-focused
- Free, no sign-up
Meet your in-browser AI assistant
Describe what you need in plain language and it’ll point you to the right tool. It runs entirely on your device — no signup, no tracking, nothing leaves your browser.
Most used on DevTools
Data Generators
Generate valid test identities, bank accounts and tax numbers for your development and QA environments — no real data involved.
National Identity Generator
Checksum-valid national IDs — TC Kimlik, SSN, Emirates ID, CPF, NRIC and more.
Tax Number Generator
Format-valid tax IDs — VKN, EIN, TFN, Steuernummer, VAT, UEN and more.
IBAN & SWIFT Generator
Validate, format and generate IBANs plus SWIFT/BIC codes.
Barcode Generator
Generate CODE128, EAN, UPC and more — download as SVG or PNG.
Base64 Toolbox
Encode and decode text, files and images with Base64, Base64URL and Data URI support.
YouTube Thumbnail Downloader
Preview and download every available thumbnail size from a YouTube, Shorts or live link.
Fresh off the bench
Did you try our newest tools?
Explore our latest privacy-first creator & business tools — all running entirely in your browser, no sign-up required.
Code Snippet to Image
Convert code snippets into beautiful, high-resolution images for sharing.
Freelance Invoice Generator
Create and download professional invoices as PDF directly in your browser.
Hourly Rate Calculator
Calculate your minimum freelance hourly rate based on income goals and expenses.
YouTube SEO Builder
Optimize video titles, descriptions, and tags for better ranking.
Social Frame Studio
Convert screenshots into social media ready posts with backgrounds and frames.
Mesh Gradient Generator
Create fluid color transitions and noise-textured backgrounds.
Browse by category
Every tool runs in your browser — pick a category to dive in, or press ⌘K to search.
Color Tools
Color utilities and generators
Box Shadow Generator · Color Blindness Simulator · Color Contrast Checker
Design Tools
Theme builders and design asset generators
Dummy Avatar Generator · Mesh Gradient Generator · OG Image Generator
Data Processing
Format, convert and process data
Base64 Toolbox · CSV to Chart · CSV to JSON Converter
Text & Analysis
Text processing and analysis tools
Binary Text Translator · Case Converter & Text Formatter · Character Frequency Analyzer
Generators
Generate IDs, references and more
Address Generator · ASCII Text Art Generator · Credit Card Generator
Security Tools
Security analysis and authentication tools
AES Encryption · Basic Auth Generator · Bcrypt Generator & Verifier
Network & API Tools
HTTP clients and network utilities
Bandwidth Calculator · DNS Lookup Tool · Email Header Analyzer
Development Utilities
Essential utilities for developers
CHANGELOG Generator · Chmod Calculator · Credit Card Validator
Visual Tools
Preview and convert visual content
Aspect Ratio Calculator · Barcode Generator · Base64 Image Encoder
Creator & Business Tools
Privacy-first helpers for creator payouts and business workflows
Code Snippet to Image · Creator Tax Form Guide · Freelance Invoice Generator
AI Tools
Assemble context, manage prompts and prep RAG data for LLM workflows
Context Assembler · Prompt Template Builder · RAG Text Chunker
Frequently asked questions
Missing a tool? Found a bug?
DevTools is built for developers, by developers. Tell us what you need next — your feedback shapes what gets added.