Free online tools

Fast tools for everyday web tasks.

FastUtils is a growing collection of lightweight online tools for AI prompts, JSON, images, text, development tasks and everyday productivity.

Try Flow Prompt Tool Try JSON Stringify

Available tools

A small collection of real, focused tools. Each page is designed to solve one task directly in your browser.

Google Flow Prompt Generator

Create video prompts for Google Flow, Gemini Omni and other AI video generators.

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JSON Stringify Tool

Convert formatted JSON into a compact one-line JSON string, or format JSON for easier reading.

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More tools coming

JSON diff, image size checks, URL utilities and other small web tools can be added next.