Developer Tools - Choose Your Tool

Select a tool to convert colors, format code, transform files, and more - all in your browser

All Tools
Why DevDeck

Fast, private, no signup.

DevDeck puts dozens of everyday developer utilities in one place. Pick a tool, paste your input, and get the result instantly. Everything runs in your browser, with nothing to download and nothing to configure.

Instant results

Tools run the moment you paste your input, with no queues, no upload bars, and no waiting on a server to respond.

Private by default

The code, text, and files you paste or open are handled right in your browser and stay on your own device.

Free, no signup

Every tool is free, with no account, no email, and no usage limits. Open one and start working.

Dozens of tools, one tab

Formatters, converters, and color and number utilities live together, so you can stop hunting for single-purpose sites.

Works everywhere

Everything runs in any modern browser on desktop, tablet, or phone, with nothing to install, update, or configure.

Easy on the eyes

A clean, distraction-free interface with light and dark themes that stays out of your way while you work.

How it works

Three steps, every time.

Every tool follows the same simple flow, so there's nothing new to learn when you switch between them.

1

Pick a tool

Choose any tool from the grid above. There's no account and no setup. It opens ready to use.

2

Add your input

Paste your code, text, or value, or drop in a file. Everything is processed locally in your browser.

3

Copy the result

Get the formatted, converted, or generated output instantly and drop it straight back into your project.

What's inside

Six toolkits for everyday dev work.

From color and code to data formats and number bases, DevDeck covers the small tasks that interrupt your day.

Color tools

Convert between HEX, RGB, and other notations, explore palettes, and pick colors visually. The everyday essentials for CSS and design work.

HEX RGB Picker

Image tools

Encode images to Base64 data URIs and back, and build CSS sprites, handy for inlining assets and cutting extra requests.

Base64 Sprites

Code tools

Beautify or minify JavaScript, CSS, HTML, and JSON in one click: readable while you debug, compact for production.

JS CSS HTML JSON

File converters

Move data between JSON, CSV, XML, YAML, and TSV in any direction, reshaping API responses, exports, and configs without writing a script.

JSON CSV XML YAML TSV

Number converters

Translate values between binary, decimal, hexadecimal, and octal: quick help with bitmasks, color values, permissions, and low-level code.

BIN DEC HEX OCT

Web dev tools

Prototype in a live HTML/CSS/JS playground, diff two snippets, test regular expressions, and generate the small files projects need.

Playground Diff RegEx
FAQ

Frequently asked questions.

Quick answers about privacy, pricing, supported formats, and what each set of tools is for.

Yes. Every tool on DevDeck is completely free, with no usage limits, no ads-wall, and no trial period. Open a tool and start using it immediately.
No. There is no signup, login, or email required. Pick a tool from the list above and it works right away.
The code, text, and files you paste or open are processed right in your browser and stay on your own device. They aren't uploaded to a server. You can use DevDeck without worrying about sensitive snippets leaving your machine.
Yes. The tools run in any modern browser, so they work on phones and tablets as well as on desktop.
Beautifying (formatting) re-indents code to make it readable, while minifying strips whitespace and comments to make files as small as possible for production. DevDeck offers both for JavaScript, CSS, HTML, and JSON.
Whenever you need to move data between formats, for example turning an API's JSON response into a CSV you can open in a spreadsheet, or converting a YAML config into JSON. DevDeck converts between all of these formats in any direction.
Use the number converter tools above. Type or paste a value in one base and get the equivalent in the others instantly, handy for debugging bitmasks, color values, file permissions, and low-level code.
They describe the same color in different notations: HEX (like #7b88c7) is common in CSS, while RGB (like rgb(123, 136, 199)) is easier to adjust channel by channel. DevDeck's color tools convert between them and let you pick colors visually.
Base64 turns binary data, such as an image, into plain text so it can be embedded directly in HTML, CSS, or JSON without a separate file. Use the encode tool to inline an image as a data URI, and the decode tool to turn a Base64 string back into a viewable image.
Paste your pattern and some sample text into the RegEx tools to see matches highlighted live as you type. It's the quickest way to debug a tricky pattern before dropping it into your code.
The playground lets you write HTML, CSS, and JavaScript side by side and see the rendered result update instantly, ideal for prototyping a snippet, reproducing a bug, or testing an idea without setting up a project.
Paste both versions into the diff tool to see exactly what was added, removed, or changed, line by line, useful for reviewing edits, config changes, or API responses.
No matching questions Try a different search term or clear the filters.