Best Utilities / Developer Tools in 2026

Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.

Key calculator.net features:

Comprehensive Range of Calculators User-Friendly Interface Free Access Detailed Explanations

Free MVP cost calculator: describe your app in 5 clicks and get a realistic 2026 estimate for a freelancer build, a traditional agency and a fixed-price 14-day build by senior professionals, where the client owns the code.

Key SquadPrime features:

Estimate in 5 clicks Three build routes compared No signup 2026 market rates

Visit website free Sponsored

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

Online Tools like Beautifiers, Editors, Viewers, Minifier, Validators, Converters for Developers: XML, JSON, CSS, JavaScript, Java, C#, MXML, SQL, CSV, Excel.

Key CodeBeautify features:

User-Friendly Interface Wide Range of Tools No Installation Required Free to Use

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

Free Online Calculators, Converters, and Tools.

Key utilkit features:

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

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

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

Free online tools for webmasters, SEOs & developers. Domain availability, WHOIS, DNS, HTTP status, JSON formatter & 20+ tools. No sign-up, no ads. Fast & browser-based.

Fast date, time, and business-day calculators with developer API access.

freemium $12 / Monthly (10,000 API requests a month, 20 saved widgets, white-label)

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

Key ClipBuddy features:

Screenshot OCR Semantic Search Paste Stack Privacy Architecture

freemium $2 / Monthly

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

Build high-converting GitHub READMEs, export formatted PDF & Word docs, and unlock 25+ templates with automated shields.

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