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Data URI Decoder

Decode a data URI and see what is inside it.

  • Free
  • No signup
  • Nothing uploaded
  • No watermark

Media type

text/plain

Encoding

base64

Decoded size

11 bytes

Decoded
Hello world

How to Use the Data URI Decoder Online

Data URI Decoder: before and after TEXT A YOUR INPUT DATA URIDECODER DONE A RESULT

Decodes a data URI and shows what is inside. Useful for inspecting an embedded image or script in a page you did not write, since a data URI is opaque by design and can carry anything.

No software to install Free Works on any device

Step-by-Step Guide to Using the Data URI Decoder

  1. 1. Paste your content into the box

  2. 2. Set the options underneath — the result updates as you type

  3. 3. Copy the result

    Nothing is uploaded.

Try it now

What is the Data URI Decoder?

Decodes a data URI and shows what is inside. Useful for inspecting an embedded image or script in a page you did not write, since a data URI is opaque by design and can carry anything.

Why Use Web Development Tools in the Browser?

Small web jobs like minifying CSS, checking HTML, escaping a string or writing a Dockerfile rarely deserve a new install. These tools do each one in a tab, and your code is never sent to a server.

“The fastest tool is the one already open in a tab.”
  • Code checked for errors
  • Messy code made readable
  • Number bases converted
  • Selectors and paths tested
  • Minified files for faster pages
  • Config files from templates
  • CI workflows drafted quickly
  • Source code stays private

Popular Uses for Developer Utilities

These are the small tasks that interrupt a day of web work.

  • Minifying assets Shrink CSS or JSON before deploying, then beautify it again to read.
  • Validating markup Catch unclosed tags and syntax errors in HTML, CSS or JavaScript before publishing.
  • Docker setups Draft a Dockerfile, Docker Compose file or .dockerignore for a new project.
  • CI pipelines Generate a GitHub Actions or GitLab CI workflow and adjust it to fit.
  • Number conversions Convert between binary, decimal, hex and octal while reading low-level data.
  • Selector testing Try a CSS selector or JSONPath expression against sample input and see matches.
  • Data URIs Turn a small image into a data URI to embed directly in CSS.
  • Project files Create .gitignore, EditorConfig and CODEOWNERS files without copying them from old repos.

What You Can Do with the Data URI Decoder

Handles the padding and character-set rules the specification requires

Round-trips exactly: encoding and decoding the same input returns what you started with

Distinguishes the escaping rules of JSON, CSS, JS and HTML instead of applying one to all four

Why Use ToolXkit for Data URI Decoder?

Your files stay with you

Everything runs inside your browser. Nothing you open or type is uploaded to a server.

Web Dev Tools for Different Users

Front-end developers

Validate, minify and beautify HTML, CSS and JavaScript as part of daily work.

DevOps engineers

Draft Docker, cron and CI files quickly, then refine them in the repo.

Coding students

Learn number systems, escapes and selectors by trying examples and seeing results.

Technical writers

Escape code samples and check snippets before putting them into documentation.

QA testers

Write clear bug reports and test CSS selectors against real page markup.

Open source maintainers

Set up issue templates, CODEOWNERS and gitattributes for a shared project on GitHub.

Best Times to Validate or Minify Code

Keep these open in a tab when you are:

  • Starting a new repository
  • Preparing a site for launch
  • Tracking down a syntax error
  • Containerising an app
  • Setting up automated builds
  • Reading hex or binary values
  • Writing a bug report
  • Working on a locked-down laptop

Frequently Asked Questions

Answers to common questions about this tool.

Do I need to install anything to use the Data URI Decoder?

No. Data URI Decoder runs entirely in your browser — there is nothing to download, no extension and no desktop program. It works the same on Windows, macOS, Linux, Android and iPhone.

Is it safe to use the Data URI Decoder online?

Safer than the usual alternative, yes. Most online tools upload your file to a server you know nothing about, where it sits until someone deletes it. Here the file never leaves your device — the processing happens in the page itself, so there is no server copy to leak, retain or sell.

Is my code sent to a server when I use Data URI Decoder?

No. Your code is processed in the browser tab, so private repositories, keys in config files and client work stay on your machine. It also means the tool works on locked-down work laptops where installing software is not allowed.

Will minifying break my code?

Minifying removes spaces, comments and line breaks without changing what the code does. Keep an unminified copy for editing, and test the minified version before deploying it.

Are the generated config files ready to use?

They give you a sound starting point based on common settings. Every project is different, so read through the file and adjust paths, versions and secrets before committing it.

Is Data URI Decoder free with no account?

Yes. There is no login, API key or usage cap. Open the page whenever you need it, even on a machine that is not your own.

Does Data URI Decoder follow current web standards?

The validators and generators follow current web standards and common tool conventions. Standards keep moving, so for edge cases check MDN or the official specification listed in further reading.

Further reading

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