How to use parser extract tools
Choose a parser by the shape of the data you have. Cookie Parser reads Cookie and Set-Cookie headers, Logfmt Parser reads key=value records, User-Agent Parser reads browser identity strings, and HTML Table Extractor reads tables in HTML, uploaded files, or public URLs.
Parse cookies and browser headers
Cookie Parser takes Cookie and Set-Cookie header strings. The output separates names, values, and attributes, and marks duplicate cookies and warnings.
User-Agent Parser accepts one User-Agent string or a batch of them. It reports the browser and version, rendering engine, operating system and version, device type, a model when detectable, and bot or crawler classification. Unknown tokens remain visible.
Parse logfmt lines into records
Logfmt Parser reads Logfmt or Heroku-style key=value lines and returns structured records. Quoted values, escaped quotes, escaped backslashes, empty values, bare tokens, and repeated keys are included in its input handling. Per-line warnings identify lines that need review.
Its record table can be configured for inspection. The available exports are CSV, JSON, and JSONL.
Extract tables from HTML
HTML Table Extractor accepts pasted HTML, an uploaded .html file, or a public URL. It extracts every table, keeps nested tables separate, and resolves rowspan and colspan into a rectangular grid. Tables can be exported as CSV, JSON, or XLSX.
Use HTML Table Extractor for table markup. Cookie Parser, Logfmt Parser, and User-Agent Parser handle header strings, log lines, and User-Agent values instead.
Typical jobs
- Inspect a Cookie or Set-Cookie header with Cookie Parser and check its attributes, duplicate markers, and warnings.
- Review Logfmt lines in the record table, check per-line warnings, and export the records as CSV, JSON, or JSONL.
- Parse a set of User-Agent strings and inspect the reported browser, operating system, device, and bot classifications.
- Provide pasted HTML, an .html file, or a public URL to HTML Table Extractor, then export the extracted tables.
Choosing a parser extract tool
Start with the input format. Cookie Parser reads Cookie and Set-Cookie headers. Logfmt Parser reads key=value log records. User-Agent Parser reads browser identity strings. HTML Table Extractor reads HTML table markup in pasted HTML, an uploaded file, or a public URL. The parent Parser Tools category contains the cookie, User-Agent, logfmt, and HTML table parser groups.
Frequently asked questions
Which parser extracts Cookie and Set-Cookie headers?
Cookie Parser extracts names, values, attributes, duplicate markers, and warnings from Cookie and Set-Cookie header strings.
How do I parse logfmt or Heroku-style logs?
Provide Logfmt or Heroku-style key=value log lines to Logfmt Parser. It returns structured records with per-line warnings and CSV, JSON, or JSONL export options.
Can I extract tables from an HTML file?
Yes. HTML Table Extractor accepts pasted HTML or an uploaded .html file, and it can also fetch a public URL you provide.
What happens when I provide a public URL to HTML Table Extractor?
HTML Table Extractor fetches the public URL and extracts its tables. You can also provide pasted HTML or an uploaded .html file.