Free JSON & XML tools

Format, validate, diff, and convert data in your browser. No uploads, no sign-up — the same neutral editor chrome you get inside every tool on this site.

100% in-browser No sign-up Works offline after first load

JSON tools

{ }

JSON Editor Pro

Featured

Tree view, format, diff, JSON Schema validation, and CSV / YAML / TOON transforms

JSON Formatter

Format

Pretty-print or minify with sort keys and 2 / 4-space indent

JSON Diff

Compare

Side-by-side diff with deep sort and syntax highlighting

YAML Diff

Compare

Compare YAML configs with per-side sort and format toggles

JSON to CSV

Convert

Turn JSON arrays into spreadsheet-ready CSV

JSON to YAML

Convert

Convert JSON to clean block-style YAML

JSON to TOON

Convert

Token-Oriented Object Notation for LLM-friendly output

XML tools

</>

XML Editor Pro

Featured

Tree view, diff, XPath, XSLT, XSD validation, and converters — all in-browser

XML Formatter

Format

Pretty-print or minify XML instantly

XML Diff

Compare

Compare two documents with sort and whitespace options

Validate XML

Validate

Well-formedness check and XSD schema validation

XPath Studio

Query

Run XPath expressions and inspect results

XSLT Playground

Transform

Apply your own XSLT stylesheet to XML

XML to JSON

Convert

Convert XML documents to JSON

XML to YAML

Convert

Convert XML to YAML format

XML to CSV

Convert

Flatten XML to CSV for spreadsheets

XML to Markdown

Convert

Convert XML structure to Markdown text

XML to HTML Table

Convert

Render XML as an HTML table

Image Toolkit

External

From the same team.

Resize, compress, and convert images in your browser — no upload