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Free Online Tools for Developers & Productivity

ToolZone is a curated collection of 20 free online tools for developers, designers, writers, and everyday productivity. Every tool runs entirely in your browser — no signup, no uploads, no tracking. Your data never leaves your device.

Format and validate JSON, generate strong passwords, encode and decode Base64 or URLs, test regular expressions, convert colors, build CSS gradients, calculate BMI or age, generate Lorem Ipsum, hash text with MD5 or SHA-256, and more — all from a single fast, private, dark-themed workspace.

Whether you're a developer needing quick utilities, a designer working with colors and gradients, or a writer counting words and characters, ToolZone gives you instant, ad-free access to professional-grade web tools that work offline once loaded.

Free Unix Timestamp Converter

Convert Unix timestamps (epoch seconds or milliseconds) to readable UTC and local dates, or convert a date back to an epoch timestamp. Essential for debugging logs, APIs, JWT tokens and database records.

Features

How to use

  1. Step 1. Paste a timestamp or pick a date.
  2. Step 2. See the converted value instantly.
  3. Step 3. Copy the result.

Frequently Asked Questions

What is a Unix timestamp?

The number of seconds (or milliseconds) since January 1, 1970 00:00:00 UTC — the standard way computers store moments in time.

Seconds vs milliseconds — how do I tell?

A 10-digit number is seconds; a 13-digit number is milliseconds. We auto-detect based on length.

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