AI Context Window Calculator
AI ToolsWill my text fit in the model’s context window?
FreePrivateInstant
Add a file · .txt .md .csv .json … · up to 2.00 MB
Tokens to keep for the answer
Custom model window (tokens, optional)
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History
All history →AI Context Window Calculator — at a glance
Will my text fit in the model’s context window?.
Your text or values
Run
Instant result
How to use it — step by step
Just your input — nothing to install or sign up for.
1
Add your input
Paste or type into the big box, or press “Try a sample” to see an example.
2
Choose options
Pick the settings you want. The defaults work well for most people.
3
Run the tool
Press the button and the result appears in a moment.
4
Copy the result
Use the Copy button to paste it wherever you need.
Pro tips
Small things that make the result better.
✦Hindi and other non-English text can use 2–4× more tokens than English.
✦Remember: the whole chat history plus the new reply must fit in the window.
Quick facts
Freeno signup, no limit
Instantresult in a moment
Privatenothing is uploaded
Any devicephone, tablet or PC
Frequently Asked Questions
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.
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