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All Developer Tools

Explore a collection of free online developer tools designed to help developers format data, debug code and work faster.

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JSON Formatter

Format and beautify JSON instantly.
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JSON to C# Generator

Convert JSON objects into C# classes automatically.
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Base64 Encoder

Encode and decode Base64 strings quickly.
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UUID Generator

Generate unique UUID identifiers instantly.
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Password Generator

Create strong and secure passwords.
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QR Generator

Generate QR codes for URLs and text.
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Regex Tester

Test and debug regular expressions instantly.
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Regex Builder

Generate regex patterns for common use cases.
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AI Token Calculator

Estimate tokens for GPT, Claude and Gemini models.
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Prompt Cost Calculator

Calculate AI prompt cost based on token usage.
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Context Window Calculator

Check token limits for AI model context windows.

Free Online Developer Tools

SaveTime Tools provides a growing collection of free developer utilities that run directly in your browser. These tools help developers format JSON, generate UUIDs, encode Base64 data and test regular expressions without installing additional software.

Tools for Modern Developers

Developers frequently need small utilities when building applications. Instead of writing scripts or installing packages, these online tools allow you to perform quick operations instantly.

AI Development Tools

SaveTime Tools also includes utilities for AI developers such as token calculators, prompt cost estimators and context window calculators for models like GPT, Claude and Gemini.

Frequently Asked Questions

What are developer tools?

Developer tools are utilities that help programmers perform tasks such as formatting data, testing code or generating identifiers.

Are these tools free?

Yes. All tools on SaveTime Tools are free to use and run directly in your browser.

Do you store user data?

No. All processing happens locally in your browser and no data is stored on our servers.