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

Generate eye-catching YouTube thumbnails with AI. Face-aware generation, style cloning, and instant variations. Boost your click-through rates with ThumbnailCreator.com.

Key ThumbnailCreator features:

AI YouTube Thumbnails URL to Thumbnail Face Swap

Try for free paid Free Trial Sponsored

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

Convert PDF, Word, image, video, audio, and more on FreeFastConverter.com — no signup, no watermarks, free daily conversions.

Key FreeFastConverter.com features:

Image Converter Image Compressor Documents Conversion Audio Converter

freemium

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

Native macOS clipboard manager with searchable history, OCR, and snippets.

Key ClipBuddy features:

Screenshot OCR Semantic Search Paste Stack Privacy Architecture

freemium $2 / Monthly

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

Turn any website into LLM-ready data.

Key Firecrawl features:

Fast Performance User-Friendly Interface Scalability Customizability

Open Source

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

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

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

Paste is a clipboard manager for Mac and iOS devices.

Key Paste App features:

Visual Organization Collaboration Features Template Library Cross-Device Synchronization

paid Free Trial $29.99 / Annually

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