# 132 Free Online Tools for Developers: CtrlTool

All-in-one platform with practical tools to boost your productivity.

- **Source:** [Hacker News: Show HN](https://news.ycombinator.com)
- **Published:** 2026-08-19
- **Topic:** [Software & Engineering](https://brifing.si/c/engineering)
- **Original article:** <https://ctrltool.wtf>
- **On Brifing:** https://brifing.si/s/737c08f6-dd9f-4a95-aefe-95cd8d7af6ad

## Comprehensive Tool Library

CtrlTool offers 132 different free online tools for developers and everyday users. The platform includes converters for working with data formats like JSON, YAML, and CSV. It also features utilities for web technologies including HTML, CSS, JavaScript, and SQL. All tools process locally in the browser whenever possible for fast results.

## Data and Code Utilities

The platform provides regex expression building and testing capabilities. It includes case conversion, find/replace, and diff tools for code editors. Security tools like hash generators, password checkers, and JWT decoders are available for data analysis. Developers can also find API testing tools and HTTP header inspection features on the platform.

## SEO and Web Tools

CtrlTool contains SEO tools such as meta tag generators, sitemap creators, and UTM builders. Website administrators can use IP lookup, DNS checkers, and SSL test tools. Content management system helpers like slug generators and schema markup builders are also included. These tools accelerate technical SEO processes for web projects.

## Everyday Utilities

The platform offers practical tools like QR code generators, color pickers, and unit converters for daily use. Time management helpers include world clocks, timers, and date calculators. Financial calculation tools feature mortgage calculators, BMI calculators, and percentage calculators. Consolidating all these tools in one platform optimizes user experience.

## Data Generation Tools

CtrlTool includes fake data generators and random pickers for test data creation. Developers can use UUID generators and config file creators. Password generators and text manipulation tools help speed up prototyping processes. These utilities particularly save time during software testing phases.

## File Converters

The platform offers PDF-to-text and text-to-PDF conversion features. It enables easy conversion between different file formats, especially between common data formats like CSV-JSON and YAML-JSON. These capabilities provide significant convenience for data analysts and developers working with multiple data formats.

## Designer Tools

CtrlTool contains HEX-RGB color code converters and palette creators. UI/UX designers can access gradient generators and color contrast checkers. Responsive design testing tools and viewport measurement helpers are also available. These features optimize design processes, enabling more efficient workflow for creative professionals.

## Productivity Booster

CtrlTool significantly accelerates daily workflows for developers and technical teams. Consolidating all tools in one platform eliminates the need to switch between different websites. It saves valuable time for small teams and freelance workers. Being completely free, the platform offers budget-friendly accessibility to essential tools.

## Sources covering this story

- https://ctrltool.wtf — 

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_Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._