Free Online Developer Tools

Every tool you need, right in your browser.

12 powerful utilities for developers, writers, and AI enthusiasts. All tools run 100% in your browser — fast, free, and completely private.

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Lightning Fast

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AI & Prompt Helpers

Transform simple prompts into professional, detailed instructions

Format code snippets for AI with proper markdown

Remove AI prefixes and clean up generated text

Estimate token count for LLM API usage

Format, validate, and explore JSON with tree view

Encode and decode Base64 strings and images

URL encode/decode and build UTM parameters

Convert Unix timestamps to human-readable dates

Convert text to UPPER, lower, Title, camelCase

Remove duplicates, sort, and clean up lists

Count words, characters, and estimate reading time

Preview Markdown with live side-by-side editing

Built by developers, for developers. Experience tools that respect your privacy and time.

All processing happens in your browser. Your data never leaves your device.

No server round-trips. Get instant results with client-side processing.

No sign-up, no subscription, no hidden fees. Just use the tools you need.