Watch: count tokens in files
No sound. Each step is captioned on screen and also written out in the guide below.
AI Tools
AI File Token Calculator
How many tokens is that PDF, Word file, spreadsheet, image, or code? Drop your files and see what they cost on GPT, Claude, and Gemini before you send them.
Count tokens in files locally
Runs locally in your browser. Files are read on your device, not uploaded, saved, or shared.
Add files to see their token cost.
| File | OpenAI GPT-6, GPT-5, GPT-4o | Claude Opus 5 and newer | Gemini Gemini 3 and later | Actions |
|---|
- Exact: OpenAI's tokenizer, on the file's text.
- Formula: the provider's published rule, such as image size or pages.
- Estimate: a documented range or rule of thumb; the API's usage numbers are what's billed.
Know the cost in three steps
- 01Drop your files
One file or a batch: documents, images, data, and code together.
- 02Compare the providers
See each file's tokens on GPT, Claude, and Gemini, and the total.
- 03Trim if needed
Resize images, compact code, or send a document's text instead of the file.
How each file is counted
- Text, code, CSV, JSON: tokenized exactly for OpenAI; estimated for Claude and Gemini.
- Word, Excel, PowerPoint: their text, extracted the way you'd paste it.
- Images: each provider's size rules.
- PDF: per page. Claude reads each page as text plus an image (1,500–3,000 tokens a page); Gemini 3 charges 560 a page by default; OpenAI doesn't publish a figure.
Frequently asked questions
How many tokens is a PDF?
On Claude, typically 1,500 to 3,000 tokens a page, because each page is read as both text and an image. On Gemini 3 and later, 560 tokens a page by default. OpenAI also reads text and page images but doesn't publish a formula. Sending just the text, when the layout doesn't matter, usually costs far less.
Why are some numbers ranges?
Only OpenAI publishes its tokenizer, so only OpenAI's text counts are exact. Claude's and Gemini's are estimates from documented ratios, and PDF figures depend on how dense each page is. For exact numbers, use each provider's token counting API.
How are Word and Excel files counted?
By their text: paragraphs, table rows, and each sheet as comma-separated rows. That's what you'd paste into a chat, and what most AI apps extract. Images inside them aren't counted. Use "Copy text" to get that text.
Are my files uploaded?
No. Every file is read in your browser, and nothing is sent anywhere.