RSS / Atom Feed Validator
RSS / Atom Feed Validator: Parses RSS 2.0 and Atom XML, checks the supported required feed metadata, and counts items or entries. It does not fetch linked resources or validate every extension and date.
About this rss / atom feed validator
RSS / Atom Feed Validator — browser-based utility.
How this tool works
Parses RSS 2.0 and Atom XML, checks the supported required feed metadata, and counts item or entry elements. It does not fetch linked resources or validate every extension, namespace, or date value.
- cURL Command Tokenization: Tokenizes shell commands, handling quoted strings, multiline backslashes, headers, and multipart form payloads.
- Protocol Semantic Parsing: Maps flags to HTTP method, target URL, query parameters, authorization credentials, and body data.
- Client Code Synthesis: Synthesizes idiomatic programming language constructs with correct asynchronous syntax and error handling.
- Security & Header Diagnostic: Checks for dangerous header combinations such as CORS wildcard '*' alongside credentialed requests.
Worked example
Scenario: A content publisher validates an RSS 2.0 or Atom XML syndication feed.
Sample input:
Processing: Parses RSS 2.0 or Atom XML, checks supported required feed metadata, and counts item or entry elements; extensions and date values are not exhaustively validated.
Illustrative output:
Limits and verification
Handles escaped quotes inside body strings correctly. Flags invalid HTTP methods and unsupported command-line arguments. Does not execute live HTTP requests against external endpoints from this browser session.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
- RSS 2.0 Specification
- RFC 4287 (The Atom Syndication Format)
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Enter, paste, or select your input data into the RSS / Atom Feed Validator workspace controls.
- Review available parameter fields, units, formats, or options configured for your task.
- Click the action button or observe immediate live calculations rendered in your browser runtime.
- Inspect the resulting output and any diagnostic messages, then copy or download the result if needed.
Frequently asked questions
Which feed structures does RSS Feed Validator recognize?+
It parses XML locally and accepts an rss root with channel title, link, and description, or an Atom feed root with title, id, and updated; it counts item or entry elements.
What did the RSS fixture verify?+
A minimal RSS 2.0 channel with CZOA title, link, and description was valid with root rss, title CZOA, zero entries, and no validation errors.
What does a valid result leave unchecked?+
It does not fetch the feed, resolve links, validate publication dates, namespaces, media extensions, encoding delivery headers, signing, cache behavior, or aggregator compatibility.
Can malformed XML be reported as a valid feed?+
No. Parser errors are retained in errors, and an unsupported root or missing required channel or Atom fields makes valid false.