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Developer Tools & Converters

Fast, client-side utilities for everyday dev work — CSS conversions, formatting, generators, and more. All free, all instant.

12 toolsClient-sideNo sign-upDark mode

Tools

Developer Utilities

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📝

Text Formatter

Format your text in various styles — uppercase, lowercase, title case, sentence case, and more.

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📏

PX to REM Converter

Convert pixels to REM units instantly. Supports custom root font size. Bidirectional — enter either value.

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📐

REM to PX Converter

Convert REM to pixels instantly. Useful for JS measurements and design handoffs. Supports custom root font size.

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🔠

PX to EM Converter

Convert pixels to EM units based on parent font size. Bidirectional with custom parent font size support.

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🔡

EM to PX Converter

Convert EM to pixels using a configurable parent font size. Ideal for debugging CSS layouts.

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📺

PX to VW Converter

Convert pixels to viewport width (vw) units. Set your target viewport size for accurate results.

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🖥️

VW to PX Converter

Convert viewport width (vw) to pixels at any viewport size. Great for responsive design calculations.

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🔧

JSON Formatter

Format and minify JSON data with customizable spacing options for better readability.

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🔐

Password Generator

Generate secure passwords with customizable length and character types (uppercase, lowercase, numbers, symbols).

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🆔

UUID Generator

Generate RFC 4122 compliant UUID v4 (random) identifiers. Generate single or multiple UUIDs at once.

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🔑

Hash Generator

Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-384, SHA-512) from your text input.

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🔗

URL Shortener & Linktree

Shorten URLs and create your personal link-in-bio page to share all your important links in one place.

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FAQ

Frequently Asked Questions

Everything you need to know about GeekDas and its tools.

GeekDas is a free online platform built for developers and designers. It offers a growing suite of utility tools and converters — all accessible directly in your browser with no login or installation required.

GeekDas provides instant, client-side tools to speed up everyday development tasks. From CSS unit conversions (PX, REM, EM, VW) to text formatting, JSON formatting, password generation, UUID creation, and cryptographic hashing — everything runs locally in your browser for speed and privacy.

Yes, GeekDas is completely free. There are no subscriptions, no paywalls, and no hidden costs. All tools are available to everyone without any account or sign-up.

GeekDas currently offers: PX ↔ REM converter, PX ↔ EM converter, PX ↔ VW converter, REM ↔ PX converter, Text Formatter (uppercase, lowercase, title case, etc.), JSON Formatter & Minifier, Password Generator, UUID v4 Generator, and a Hash Generator supporting MD5, SHA-1, SHA-256, SHA-384, and SHA-512.

No. Every tool on GeekDas is accessible without creating an account. Just open the tool and start using it — no sign-up, no email, no personal data required.

Yes. All conversions are performed client-side using standard mathematical formulas. For unit converters like PX to REM, you can also set a custom root or parent font size to match your project's configuration, ensuring precise results.

Yes. GeekDas is fully responsive and works on all modern devices — desktop, tablet, and mobile. The interface adapts to your screen size so you can use any tool on the go.