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Logs & Sharing

SSE Frame Debugger

Turn a captured event stream into readable frames and explain dispatch, ignored fields and incomplete events.

Processed on our CPU server.Submitted input is processed for this run and is not stored.
1024 KiB limit

Input

WHATWG SSE · parser v1

Result

A useful result starts here.

Paste your input or load an example,
then run the tool.

Supported formats & limitations
  • Parses LF, CRLF and CR; strips one leading BOM. Preserves comments and raw fields in the report.
  • A blank line dispatches only frames containing data fields, including an empty data field. No final event is fabricated at end of capture.
  • Last event ID and valid retry values persist between frames. NUL IDs and non-digit retry values are ignored and explained; unknown fields are legal and ignored.
  • [DONE] remains ordinary data. No provider-specific decoding, live interception, timestamp inference or remote fetching.
  • Maximum 10,000 lines, 2,000 non-empty frames and 128 KiB per line. Findings cap at 200 with truncation declared.

Execution budget: 5s; output limit: 4096 KiB. Browser worker startup has a separate 3s allowance.