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Browse free online tools in the Developer Tools category, built by the Webpenter development team. Every tool runs in your browser with no login, no ads, and no installation required.
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Developer Tools
Decode Base64 strings or Data URLs back into images (PNG, JPG, JPEG, WEBP, GIF, BMP, SVG). View image preview, dimensions, size, and download the decoded image.
Convert images (PNG, JPG, JPEG, WEBP, GIF, BMP, SVG) to Base64 encoded strings or Data URLs instantly. Safe, browser-based conversion with file size and dimension stats.
Paste any code snippet, select your language, and get an instant explanation — either as a numbered step-by-step breakdown or as an interactive flow graph. 100% free, runs in your browser, no API key or signup needed.
Paste two texts and instantly see what changed — added, removed, and unchanged lines highlighted side-by-side or unified.
Easily create and customize HTML tables visually. Generate clean code for your websites.
Estimate the cost of using AI services like OpenAI GPT-4, Claude, and Gemini based on token usage.
Enter a website URL to identify the technologies it’s built with (CMS, Frameworks, Analytics, Server).
Encode and decode text and files to/from Base64 format instantly. Support for images with preview. Perfect for data encoding and API development
Encode and decode URL strings instantly. Perfect for handling special characters in URLs and query parameters
Compare two code snippets side by side with visual diff highlighting
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