109 Free Online Tools for Developers, Designers, and Creators in 2026

There are thousands of "free online tools" sites out there. Most are slow, plastered with ads, and send your data to their servers. We built something different.

OnlineTools360 is a collection of 109 tools that all run entirely in your browser. No signups, no server processing, no tracking. Your data never leaves your device.

Developer Tools

The developer category is the largest with 17 tools. Format and validate JSON or XML. Encode and decode Base64, URLs, and HTML entities. Generate UUIDs, decode JWTs, build regex patterns, calculate chmod permissions, and test cron expressions. There's also a diff checker, Lorem Ipsum generator, and HTTP status code reference.

Design Tools

Pick colors with the Color Picker, generate harmonious color palettes, and create CSS gradients. Preview Google Font pairings, generate box shadows and glassmorphism effects, and calculate aspect ratios.

File Tools

The biggest category at 21 tools. Merge, split, rotate, and compress PDFs. Convert images between formats, resize them, compress them, and extract text. Calculate file hashes, convert Markdown to HTML, JSON to CSV, and more.

Security Tools

Generate secure passwords, create hashes (MD5, SHA-256, SHA-512), encode with .htpasswd, check your browser privacy, and look up your IP address info.

Math, Finance, Health, and More

From percentage calculators to loan calculators, BMI calculators to word counters — there are tools for everyday tasks across 10 categories.

Why Client-Side Matters

Every tool runs as JavaScript in your browser. When you paste a password into our hash generator, format JSON with API keys, or calculate your BMI — that data is processed locally and never transmitted. It's not just a privacy feature; it's faster too.