Top Free
XML & JSON Development Alternatives

Professional-grade replacements for XML & JSON Development software. Verified for features, security, and zero cost.

Tools Tested

100%

Free or Open Source

Database Updated Dec 2025

Hand-Picked Comparisons

Save $649 (Professional) / $1,299+ (Enterprise)

Altova XMLSpy 2026

The enterprise leader in graphical XML and JSON modeling. The 2026 edition introduces a BSON editor for MongoDB, an AI Assistant for natural-language code generation, and deep integration with Visual Studio 2026. While its XSD and WSDL visual designers are world-class, its high cost and Windows-centric design make it restrictive for lightweight or Linux-based workflows.

Top Recommended Replacement

VS Code (XML by Red Hat)PRO CHOICE

Industry-standard validation using the LemMinX server; support for XML catalogs and XSD 1.1; massive ecosystem for XSLT and XPath; cross-platform (Windows, Mac, Linux).

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Mastering XML & JSON Development for Free

Our mission at Best Free Alternatives is to democratize access to high-end digital tools. The software listed above provides professional-grade results without the burden of monthly subscriptions. Whether you are a student, freelancer, or small business owner, these XML & JSON Development alternatives are production-ready.