Tooltle turtle mascotTooltle
Tooltle — Tools that stick with you.

Free online developer tools — all processing happens locally in your browser. No signups, no uploads of your data. Just tools that work, steady and reliable.

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Text Tools

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JSON Formatter

Format, validate, and prettify JSON with syntax highlighting

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Base64 Encoder/Decoder

Encode and decode text and files to/from Base64

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Word Counter

Count words, characters, sentences, and estimate reading time

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Diff Checker

Compare two texts and find differences line by line

Generators

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Password Generator

Generate strong, random passwords with customizable rules

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QR Code Generator

Create QR codes from URLs, text, or any data instantly

Image Tools

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Image Compressor

Compress images right in your browser — no upload to servers

About Tooltle

Tooltle is a collection of free, browser-based developer tools. Like a turtle carrying its home, every tool runs entirely on your device — the content you process never leaves your browser. No signups, no uploads. Just steady, reliable tools that are always here when you need them.

Have a suggestion? We'd love to hear it. More tools coming soon.

Tooltle is free and always will be. If it saves you time, you can buy us a coffee.