OPML (Outline Processor Markup Language) is an XML format for outlines. It is commonly used to exchange podcast and RSS subscriptions.
JSON is a lightweight data interchange format that is easy for humans to read and write, and machines to parse.
FreeFileConvert uses tuned encoding for OPML to JSON conversions, preserving clarity while trimming file size. Finished audio streams instantly across phones, tablets, desktops, and modern browsers without extra tweaks.
Upload OPML files from desktop, tablet, or cloud storage, queue multiple jobs, and let the converter finish autonomously. Return whenever convenient to download synchronized JSON results on any device you rely on.
Process up to 5 files sized 1000 MB per batch without splitting queues manually. Mixed-format uploads convert together, producing consistent JSON audio with dependable progress tracking.
OPML files contain hierarchical outline nodes with attributes. They are widely used for feed aggregator import/export.
JSON uses key-value pairs and arrays, derived from JavaScript but language-independent.
Upload your document file in the OPML format from your device, Dropbox, or Google Drive.
Select JSON as the output format and click Convert. Adjust optional settings if needed.
Download the converted document file. Each file stays available for up to 5 downloads.