FASTA header extractor
Tools
Extract FASTA headers or sequence IDs from FASTA files. Return full headers or ID-only lists, with optional deduplication and numbering for downstream analysis.
About this tool
FASTA Header Extractor extracts record headers or sequence IDs from FASTA input as plain text, one line per record. You can return full headers or only record IDs, with optional deduplication and numbering for downstream processing. This is useful for creating ID lists, checking duplicates, or preparing inputs for filtering steps. For removing duplicated IDs directly, use the FASTA ID deduplicator. For format rules and header structure, see FASTA format reference.
For larger datasets, multi-file runs, or more involved workflows, this can be executed separately as a custom analysis.
- ✓ No hidden transformations
- ✓ Input processed only for this request
- ✓ FASTA structure preserved in output
