Sequence utilities / Sequence formatting
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Brings FASTA files from different sources to one layout: fixed line width, consistent case, tidy headers, and optional de-duplication by sequence or ID.
“ID only” drops the description after the first space; “special characters replaced by _” suits software with strict ID rules (e.g. tree-building programs); “Rename” keeps the original ID in the description for tracing.
De-duplication by sequence ignores case and keeps the first occurrence; removed records and the record they duplicate are listed in the table below.
Order of operations: remove non-letters → remove gaps → change case → drop empty → de-duplicate.
FASTA format (Pearson & Lipman 1988, PNAS 85:2444).
Runs in your browser; up to roughly 100 MB of sequence is recommended.
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