Data & Code Tools

Format, check and convert data and text: JSON, XML, CSV, YAML and Markdown. Make files readable, find mistakes, and turn one format into another, right in your browser.

  • 15 free tools
  • Free daily uses
  • No sign-up needed

Last updated

JSON Toolkit

Format and validate JSON, minify it, or convert it to CSV or YAML. Runs in your browser: your data is never uploaded.

XML Toolkit

Format, beautify and check XML in your browser, with exact error locations. Your data is never uploaded.

Markdown Toolkit

Convert Markdown to HTML and back, build Markdown tables and create a README in your browser, with a preview. Your text is never uploaded.

Learn more

  • How to Convert JSON to XML (with Attributes)

    Web services and apps speak JSON, while many imports, feeds and older systems still want XML. Here’s how each piece of JSON turns into XML, how to get attributes, and which options to pick so the result fits the system you’re feeding.

    6 min read
  • How to Convert XML to CSV (and Open It in Excel)

    XML exports, product feeds and API answers are hard to read, while a spreadsheet shows them at a glance. Here’s how to turn each record into a row, what happens to attributes and nested elements, and how to open the result in Excel without broken accents.

    6 min read
  • How to Convert HTML to Markdown (with a Cheat Sheet)

    Want a web page as notes, a blog post moved to a new site or a document as a README? Here’s what each HTML tag turns into, and how to get clean Markdown in a few clicks.

    6 min read
  • How to Make a Table in Markdown (Syntax, Alignment and a Free Generator)

    Typing pipes and dashes by hand is fiddly, and one missed character breaks the table. Here’s how Markdown tables work, and how to build one in a grid or paste it from Excel instead.

    5 min read

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