Free Online
Developer Tools
15 essential tools for developers and content creators — JSON formatter, Base64 encoder, regex tester, hash generators, and more. No account needed. Your data never leaves your browser.
📋JSON Tools
🔐Encoding Tools
Base64 Encoder / Decoder
Encode and decode Base64 strings online for free. Convert text or binary data to Base64 format instantly.
URL Encoder / Decoder
Encode and decode URLs online for free. Percent-encode special characters for safe use in URLs and query strings.
Image to Base64 Converter
Convert images to Base64 encoded strings online for free. Generate data URIs for CSS, HTML, and JSON.
📝Text Tools
Word Counter & Character Counter
Count words, characters, sentences, and paragraphs online for free. Instant text statistics for writers and developers.
Text Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more online for free.
Text Diff Checker
Compare two texts online for free. Highlight differences between two strings, files, or code snippets instantly.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text online for free. Custom word, sentence, and paragraph counts.
Regex Tester & Debugger
Test and debug regular expressions online for free. Match, highlight, and explain regex patterns in real time.
⏰Time Tools
🎨Color Tools
🔑Hash Tools
Why Use Dev Tools Box?
Built for developers who value speed, privacy, and reliability.
Privacy First
All processing runs in your browser using JavaScript. No data is ever transmitted to any server — safe for sensitive code and credentials.
Instant Results
No page reloads, no API calls, no loading screens. Results update in real time as you type.
Completely Free
Every tool is free forever. No account, no trial, no rate limits. Just open and use.