Case Converter

What is Case Converter?

The Case Converter is a sequence formatting tool that converts DNA, RNA, or protein sequences between uppercase and lowercase. This is useful for highlighting specific regions, meeting format requirements, or preparing sequences for publication.

How to Use This Tool

Quick guide to convert case:

1. Paste your DNA/RNA/protein sequence
2. Select conversion mode (uppercase, lowercase, or toggle)
3. Results appear automatically
4. Download or copy formatted output

When to Use

This tool is useful when you need to:

• Format sequences for publication requirements
• Highlight coding regions with different cases
• Standardize sequence formatting across datasets
• Convert case for software compatibility

Example Input

Sample input (mixed case):

Works with DNA, RNA, and protein sequences in any format.

Example Output

Expected output (uppercase):

Toggle case swaps uppercase ↔ lowercase for each character.

FAQ

Q: Does this tool handle FASTA format?
A: Yes, headers are preserved and only sequence text is converted.

Q: What is toggle case?
A: Toggle case swaps the case of each character - uppercase becomes lowercase and vice versa.