Toggle Case Converter
Flip every uppercase letter to lowercase and vice versa in one click.
What is Toggle Case Converter?
You hit Caps Lock by accident and typed half a paragraph in reverse case. Retyping it is the obvious but painful fix.
Paste the messed-up text and toggle every letter's case in one shot.
If you're recovering from Caps Lock, you fix accidental rEVERSE cAPS in seconds. If you're styling cheeky social posts, you create alternating-case effects fast. If you're testing forms, you generate weird-case input to verify your validators handle it.
How to use Toggle Case Converter
Four steps. No setup, no signup.
Step 1
Paste the reverse-case text
Step 2
See every letter flip instantly
Step 3
Tweak the original if needed
Step 4
Hit Copy and paste back where you need it
Example
Reverse-case text gets fixed in one click.
Input
hELLO wORLD
Output
Hello World
Why Toggle Case Converter is useful
- ✓
Recover from accidental Caps Lock without retyping.
- ✓
Flip every uppercase letter and every lowercase letter at once.
- ✓
Run twice and you get the original back — great for undo testing.
- ✓
Works on accented letters too (á ↔ Á).
Common questions
What does toggle case actually do?
Every uppercase letter becomes lowercase and every lowercase becomes uppercase. Numbers and symbols stay the same.
Tip: Run it twice and you get the original back.
When is this useful?
Mostly for fixing Caps Lock accidents. Some use it for stylized social posts.
Tip: Don't use it on production data — it scrambles meaningful case.
Will it work on accented letters?
'á' becomes 'Á' and vice versa.
Tip: Test with one accented letter first if your text is mixed-language.
Does it preserve punctuation?
Punctuation, numbers and whitespace stay exactly as they are.
Tip: Only letters get flipped.
Last reviewed: April 2026 · Free, browser-based, no signup.
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