Exported my OPML from Pocket Casts after they changed their sync backend. The validator found 23 feeds with empty xmlUrl attributes and 7 duplicates across different folders. My new app would have silently dropped those feeds and I never would have noticed.
OPML Subscription File Validator
or drop files here .opml, .xml, .csv, .xls, .xlsx, .xlsm (up to 50 MB)
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Validation Report Format
Showing valid rows only (download includes all rows + errors)
All rows valid
| $ |
|---|
+ more rows
valid rows
invalid rows skipped from preview
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| Row | Column | Value | Error |
|---|---|---|---|
Showing first 50 errors. more errors not shown.
more errors hidden. Download the full validation report to see all errors.
Validation Report Download
The download includes your original file with an added "Validation Error" column showing error messages for each row. Valid rows have an empty error column.
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Check your OPML file for broken URLs, duplicates, and missing data before importing to your RSS reader or podcast app.
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OPML Validator Validation Questions
What errors does this tool detect?
The tool checks for empty or missing feed URLs, URLs that do not start with http:// or https://, duplicate feed URLs across the file, missing feed titles, and invalid XML structure. Each error includes the row number and specific issue.
Can I validate OPML from any RSS reader?
Yes. The tool handles OPML files exported from Feedly, Inoreader, NewsBlur, Pocket Casts, Overcast, and any app that produces standard OPML 1.0 or 2.0 format.
What happens after validation?
You get a report showing valid feeds and any errors found. Download the error report to see exactly which feeds need fixing. Fix the issues in your OPML file and re-validate or convert with our other tools.
How OPML Validator Validation Works
1
Export from Feedly
Feedly: Organize → Export OPML (downloads feedly.opml file)
2
Export from Inoreader
Inoreader: Preferences → Import/Export → Export as OPML
3
Export from Pocket Casts
Pocket Casts: Profile → Settings → Export Subscriptions (OPML format)
4
Export from Overcast
Overcast: overcast.fm/account → Export OPML
5
Upload CSV
Upload your OPML Subscription File export file
6
Review Validation Results
Check your Opml data for errors and warnings
Issues are flagged inline with clear fix suggestions — review and correct before you import.
Common Target Import Errors
Issues you might encounter when importing Source data to Target - and how we solve them
Invalid OPML/XML Structure
File is not valid OPML or XML format
Malformed XML tags or missing root element
Valid OPML 2.0 with <opml><body><outline> structure
Ensure file is valid OPML exported from an RSS reader
Re-export OPML from your RSS reader or podcast app
Empty Feed URL
Outline entry has no xmlUrl attribute
<outline text="Missing" xmlUrl="" />
<outline text="Feed" xmlUrl="https://example.com/feed" />
Add a valid feed URL to the xmlUrl attribute
Find the correct RSS feed URL for the subscription
Invalid Feed URL Protocol
Feed URL does not use HTTP or HTTPS
ftp://not-valid.com/feed
https://not-valid.com/feed
Feed URLs must start with http:// or https://
Replace invalid protocols with https://
Duplicate Feed URL
Same feed URL found in multiple outline entries
https://example.com/feed (in Tech and Podcasts folders)
Remove duplicate from one folder
Each feed URL should appear only once in the OPML file
Remove duplicate entries keeping one copy
Why Validate OPML Before Import?
Silent Import Failures
RSS readers silently skip malformed entries during OPML import. Feeds with empty URLs, invalid protocols, or duplicate entries get dropped without warning. You think all subscriptions transferred, but some are missing. There is no error log to tell you what went wrong.
What This Tool Checks
Upload your OPML file for validation. The tool checks that every feed has a valid URL starting with http:// or https://, titles are present, no duplicate feed URLs exist, and the XML structure is valid. Get a row-level error report with specific issues to fix before importing.
How People Use OPML Validator
Feedly's OPML export included 3 feeds with ftp:// URLs and 11 entries where the title attribute was completely missing. The validator caught all 14 issues. Inoreader would have imported them as untitled broken feeds cluttering my sidebar.
Our shared OPML file had accumulated 47 duplicate feed URLs across 15 topic folders over the years. The validator flagged every duplicate with folder context so I could decide which copy to keep. Cleaned up the file in one pass instead of manually diffing XML.
Why Validate OPML Validator Before Import?
Feed URL Validation
Checks every feed URL for valid HTTP/HTTPS format. Flags empty URLs, FTP links, and malformed addresses.
Duplicate Detection
Finds feeds with the same URL across different folders. Shows which rows are duplicates.
Missing Data Check
Reports feeds with missing titles or empty required attributes that cause import problems.
Row-Level Error Report
Get specific error messages with row numbers for every issue found. Fix problems quickly.
Browser-Based Privacy
Your subscription file processes locally. Feed URLs never leave your computer.
Instant Validation
Upload OPML, get validation results in seconds. See valid and invalid feeds at a glance.
Your OPML Validator Data Stays Private
Local Processing Engine
Your OPML Validator files stay on your device. Processing happens client-side, nothing leaves your machine.
Zero Server Storage
Your OPML Validator files are never cached, logged, or stored anywhere. Every session is ephemeral.
Privacy-First Architecture
Designed for data sovereignty. No third-party trackers or analytics touch your OPML Validator files.
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Frequently Asked Questions
You can, but free scripts and AI often miss edge cases that break real-world data: missing SKUs, currency formatting quirks, tax calculation errors, or date format mismatches. We have battle-tested validators specifically designed for accounting software imports that catch these issues before they corrupt your books. Plus, you get instant browser-based conversion without installing Python or managing dependencies.
The tool checks for empty or missing feed URLs, URLs that do not start with http:// or https://, duplicate feed URLs across the file, missing feed titles, and invalid XML structure. Each error includes the row number and specific issue.
Yes. The tool handles OPML files exported from Feedly, Inoreader, NewsBlur, Pocket Casts, Overcast, and any app that produces standard OPML 1.0 or 2.0 format.
You get a report showing valid feeds and any errors found. Download the error report to see exactly which feeds need fixing. Fix the issues in your OPML file and re-validate or convert with our other tools.
Yes. The tool accepts both OPML files and CSV feed lists. For CSV-specific validation, you can also use our RSS CSV validator at /validate/rss-csv-subscriptions.
No. The tool validates URL format and data structure but does not fetch the URLs to check if they are online. For live feed checking, use a dedicated feed checker service.
The tool handles OPML files with thousands of feed entries. Processing happens in your browser so speed depends on your device.
Yes. Fix the reported issues in your OPML file using a text editor, then upload again to verify all errors are resolved.
After Validation: Convert Your OPML Subscription File
Once your Opml export passes validation, convert it to your accounting format
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