Best Free XML to JSON Tools in 2026: Ranked
- Best for quick manual use: local browser converter — no upload, no code, no account.
- Best for Python automation: xmltodict — the standard, most-used library.
- Best CLI tool: yq — converts XML to JSON from the terminal with one command.
Table of Contents
The best XML to JSON tool in 2026 depends entirely on your context: a developer automating data pipelines needs something different from an analyst who receives one XML file a week. This roundup covers the top free options across browser tools, Python libraries, JavaScript libraries, and CLI tools — with honest trade-offs for each use case.
1. Local Browser Converter — Best for Quick Manual Conversion
What it is: A web-based tool that converts XML to JSON entirely in your browser — no upload to any server.
Best for: Quick one-off conversions, debugging API responses, inspecting XML structure, and converting files on machines without developer tools installed.
Free tier: Unlimited, no account, no file size restrictions beyond browser memory.
Limitations: Manual only — not suitable for automation. One file at a time. Files over 50MB may be slow.
Privacy: Local processing — your XML never leaves your device.
2. Python xmltodict — Best for Python Automation
What it is: Open-source Python library that converts XML to a Python dict (JSON-compatible) in two lines of code.
Best for: Python developers, data pipelines, ETL workflows, batch conversion, and any automated process that receives XML input.
Free tier: Open-source (MIT license). Free forever, no API keys, no limits.
Limitations: Requires Python and pip install. Manual installation step. Attribute key format (@key) may need adjustment for your consuming system.
Privacy: Fully local — no internet connection needed after install.
Sell Custom Apparel — We Handle Printing & Free Shipping3. yq — Best Command-Line Tool
What it is: A command-line YAML/JSON/XML processor that converts XML to JSON with yq -p xml -o json input.xml.
Best for: Shell scripting, DevOps workflows, batch conversion from the terminal, CI/CD pipelines.
Free tier: Open-source (MIT license). Free binary available for all platforms.
Limitations: Requires installation. Slightly different output format from xmltodict for some edge cases. Learning curve for its full query syntax.
Privacy: Fully local — processes files on your machine.
4. Node.js Libraries — Best for JavaScript Ecosystems
xml2js: Most-downloaded XML library on npm. Familiar to most Node.js developers. Default array behavior requires configuration. Best for projects already in the npm ecosystem.
fast-xml-parser: Newer, faster, more configurable. Better default behavior than xml2js. The modern choice for new Node.js projects.
Best for: JavaScript/TypeScript projects, Express APIs receiving XML, frontend apps that parse XML, and any Node.js automation.
Free tier: Both are open-source (MIT license). Free forever.
5. Online Tools (FreeFormatter, Code Beautify) — Quick No-Install
Several established developer tool sites offer XML to JSON conversion: FreeFormatter.com, Code Beautify, and similar sites. These work without account creation and handle most standard XML.
Best for: Quick conversions on machines without developer tools, sharing snippets with team members, and using alongside other formatter/validator tools on the same site.
Limitations: Upload files to their servers (privacy concern for sensitive data). Some have input size limits. Ad-heavy interfaces.
Privacy: Server-side processing — your XML is uploaded. Fine for non-sensitive data.
For sensitive data, the local browser converter is the better choice. For non-sensitive quick conversions, FreeFormatter and Code Beautify are reliable.
Try the Top Browser Pick
Local, instant, no account. The fastest tool for manual XML to JSON conversion.
Open Free XML to JSON ConverterFrequently Asked Questions
Which XML to JSON tool has the best attribute handling?
xmltodict and the local browser converter both use the @ prefix convention, which is the most widely-accepted standard. xml2js defaults to $ prefix, which can be changed via configuration.
What's the fastest XML to JSON tool for large files?
yq and Python with iterparse are fastest for very large files. Browser tools and xmltodict with full-file loading are limited by available memory.
Do any of these tools handle XSLT transformations?
Not directly — XSLT is a transformation language, not the same as XML-to-JSON conversion. For XSLT, Saxon (Java) or libxslt (Python/CLI) are the standard tools.
Is there a free XML to JSON API?
Several tools offer free conversion APIs, but they upload your data to a server. For privacy-sensitive data, a local library (xmltodict, xml2js) is more appropriate than an API endpoint.
