ToolDeck is a collection of small tools that run in your browser. Each tool is focused on one thing. Open it, get what you need, and close the tab. No sign-up or installation required.

Do I need an account?

No. No sign-up or login is required. Just open a tool and start using it.

Is my data sent anywhere?

No. Your input is processed entirely in your browser and is not sent to a server.

Does it cost anything?

Everything is free to use. No sign-up, payment, or usage limits.

Does it work on mobile?

Yes. All tools work in mobile and tablet browsers, with no app to install.

Is my input data stored?

No. Your input data is not stored on our servers and is cleared when you leave the page.

Are the tools tested?

Yes. Each tool is tested with real-world use in mind. We check not only inputs and outputs, but also edge cases and usability, and make improvements when needed.

Do you use AI to build ToolDeck?

Yes. We use AI as part of the development process, but ToolDeck is designed and built carefully by people. We review usability and even the smallest details ourselves, making sure each tool is properly finished.

Pick a card.Solve one small thing.

Small tools in your browser for the moments between bigger tasks. No sign-up required, ready when you need them.

Browse the deck

The ToolDeck approach

About this deck

Small tools for everyday tasks.

Now in the deckEN / JA
42tools
Across 9 categories with tools
01
One tool, one job.
Each tool focuses on a specific task, so you can open it, get things done, and move on.
02
A small, curated collection.
We focus on keeping the collection small and making each tool simple and useful.
03
Guides in English and Japanese.
Every tool comes with a usage guide in both English and Japanese.
04
Runs entirely in your browser.
Tools process your data in the browser. No account or upload is required.

The deck

Browse by category

Pick a category to find your card.

Text

Count characters, tidy formatting, and convert everyday text styles.

View all [9]

Case Converter

Convert text into the letter case or naming style you need

Converter

Character Counter

Count characters and lines, with or without spaces

Analyzer
Calculation

Duplicate Line Remover

Remove repeated lines and keep only the first occurrence of each line

Formatter

HTML Tag Remover

HTML markup turned into readable plain text

Formatter

Line Sorter

Sort lines alphabetically, numerically, by length, or in natural order

Formatter

Lorem Ipsum Generator

Placeholder text to fill mockups and drafts.

Generator

Text Diff Checker

See exactly what changed between two texts

Checker

Whitespace Remover

Strip unwanted spaces, tabs, and line breaks from pasted text

Formatter

Word Counter

Count words, characters, reading time, and word frequency in your text

Analyzer
Calculation

Converter

Swap formats, encode strings, and convert units in a couple of clicks.

View all [3]

Base64 to Text

Turn a base64 string back into readable text, standard or URL-safe

Decoder

Text to Base64

Turn any text into a base64 string, standard or URL-safe

Encoder

URL Encoder

Encode or decode text for query parameters or full URLs

Encoder
Decoder

Code

Format, convert, and validate code right in the browser.

View all [2]

JSON Formatter

Make JSON easy to read

Formatter
Checker

JWT Decoder

Read a JWT's header and claims, see when it expires, and verify its signature

Decoder
Analyzer

Security

Generate passwords and work with secrets right in the browser.

View all [3]

Hash Generator

Generate SHA and MD5 hash values from text in your browser

Calculation

Password Generator

Generate strong random passwords in batches.

Generator
Download

UUID Generator

Generate random or time-ordered UUIDs.

Generator
Download

CSS

Tweak values, preview the result, and copy the snippet.

View all [9]

Aspect Ratio Calculator

Get the aspect ratio from a size, or the matching size from a ratio.

Calculation

Border Radius Generator

Adjust all four corners to find the right radius for your interface.

Generator

CSS Background Pattern Generator

Create repeating background patterns with pure CSS gradients.

Generator

CSS Cursor Viewer

Try standard cursor shapes on the spot and take home the CSS.

Checker

CSS Gradient Generator

Adjust colors and direction to create gradients for backgrounds and buttons.

Generator

Gradient Text Generator

Gradient text that makes headlines stand out.

Generator

PX to REM Converter

Convert px and rem at the root font size your CSS uses.

Converter

SVG Text Animation Generator

Draw outlines and fills with SVG stroke animation.

Generator

SVG to CSS

Turn SVG markup into a paste-ready CSS icon.

Converter

Web

Clean up URLs and links for opening or sharing.

View all [3]

Bulk URL Opener

Open many URLs at once without duplicates or tracking tags

OGP Meta Tag Generator

Open Graph and X card meta tags, ready to paste into your page

Generator

URL Query Editor

A table view of a URL’s query parameters, ready to edit and copy

URL
Analyzer

Color

Pick a color and grab the value you need.

View all [4]

Color Contrast Checker

Check text and background contrast against WCAG and APCA.

Checker
Calculation

Color Converter

Convert a color into the color formats your code uses.

Converter

Image Color Extractor

Build a copy-ready color palette from an image

Analyzer
Generator

Image Color Picker

Pick exact pixel colors from an image for color matching.

Analyzer

Image

Resize, convert, and adjust images without uploading.

View all [7]

Base64 to Image

Turn a base64 string into a downloadable image

Decoder

Dummy Image Generator

Generate placeholder images and pad them to an exact file size

Generator
Download

Favicon Generator

Website and app icons from a single image

Generator
Download

Image Splitter

Cut one image into equal tiles for grid posts and layouts

Splitter
Download

Image to Base64

Turn an image into a base64 string you can paste anywhere

Encoder

Web Page Image Extractor

List a page's images and save the ones you need at full size

URL
Download

YouTube Thumbnail Downloader

Extract YouTube thumbnails from a video URL or ID and save them at full size

URL
Download

Date & Time

Convert dates, times, and timestamps.

View all [2]

Bulk Timestamp Converter

Convert every timestamp in pasted text to UTC

Converter
Analyzer

Timestamp Converter

Turn log and API timestamps into dates

Converter
Calculation

FAQ

Frequently Asked Questions

Good to know before you get started.

Listed on

Pick a card.Solve one small thing.

About this deck

One tool, one job.

A small, curated collection.

Guides in English and Japanese.

Runs entirely in your browser.

Browse by category

Text

Case Converter

Character Counter

Duplicate Line Remover

HTML Tag Remover

Line Sorter

Lorem Ipsum Generator

Text Diff Checker

Whitespace Remover

Word Counter

Converter

Base64 to Text

Text to Base64

URL Encoder

Code

JSON Formatter

JWT Decoder

Security

Hash Generator

Password Generator

UUID Generator

CSS

Aspect Ratio Calculator

Border Radius Generator

CSS Background Pattern Generator

CSS Cursor Viewer

CSS Gradient Generator

Gradient Text Generator

PX to REM Converter

SVG Text Animation Generator

SVG to CSS

Web

Bulk URL Opener

OGP Meta Tag Generator

URL Query Editor

Color

Color Contrast Checker

Color Converter

Image Color Extractor

Image Color Picker

Image

Base64 to Image

Dummy Image Generator

Favicon Generator

Image Splitter

Image to Base64

Web Page Image Extractor

YouTube Thumbnail Downloader

Date & Time

Bulk Timestamp Converter

Timestamp Converter

Frequently Asked Questions

01What is ToolDeck?

02Do I need an account?

03Is my data sent anywhere?

04Does it cost anything?

05Does it work on mobile?

06Is my input data stored?

07Are the tools tested?

08Do you use AI to build ToolDeck?

No account. No upload.Just open a card.

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