Best Utilities / Developer Tools in 2026

Free Online Calculators, Converters, and Tools.

Key utilkit features:

Convenient utility collection Ease of use Web-based accessibility Time-saving automation

Randomly.online is a growing collection of fast, privacy-friendly online tools for developers, creators - image tools, students, and everyday users, including text tools, calculators, converters, PDF utilities, SEO tools, and productivity solutions.

Key Randomly.online features:

PDF tools Image Tools Text tools Calculators

Visit website free

Mouse Clicker automates repetitive clicks with adjustable speed, interval timing, and click frequency control, making tasks faster, easier, and more efficient.

Key MouseClicker features:

Click Intervals Click Configurations Cross-Platform Support

free

Free online tools for everyone. No signup required.

Key Plexto.tools features:

Simple interface Niche tool focus Web-based accessibility Potential for free or low-cost usage

55 free formatters, converters, generators, and reference tools for developers — JSON, Base64, JWT, regex, hashes, subnets. Nothing you paste is ever uploaded.

Key WhiteKit.dev features:

100% Client-Side Processing No sign-up Offline Capable Unified Toolset

free

Symvanta gives your AI coding agent your codebase's real call graph over MCP, so it stops guessing and knows what breaks before it edits.

paid $19 / Monthly

10015.io is an all-in-one toolbox offering many tools from various categories.

Key 10015.io features:

User-Friendly Interface Wide Range of Tools No Registration Required Cross-Platform Support

Online JSON Formatter and JSON Validator will format JSON data, and helps to validate, convert JSON to XML, JSON to CSV. Save and Share JSON.

Key JSONFormatter.org features:

User-Friendly Interface Multiple Tools Free to Use Cross-Platform

convert anything to anything - more than 200 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats supported.

Key CloudConvert features:

Versatility User-Friendly Interface Cloud Integration API Access

Helping you make rational decisions, one calculation at a time.

Key Omni Calculator features:

User-Friendly Interface Wide Range of Calculators Accuracy Educational Value

OP Auto Clicker is an all-in-one tool to automate mouse clicks.

Key OP Auto Clicker features:

Ease of Use Customizability Free to Use Low Resource Consumption

Code Beauty’s JSON Validator or JSON Lint is easy to use tool to copy, paste and validate JSON data.

Key Code Beautify JSON Validator features:

User-Friendly Interface Immediate Feedback Free to Use Additional Formatting and Tools

TinyWow provides free online conversion, pdf, and other handy tools to help you solve problems of all types.

Key TinyWow features:

Versatile Tools User-Friendly Interface Free to Use No Account Required

Sourcegraph is a free, self-hosted code search and intelligence server that helps developers find, review, understand, and debug code. Use it with any Git code host for teams from 1 to 10,000+.

Key Sourcegraph features:

Code Search Cross-Repository Search Integrations Code Intelligence

Open Source