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PromptTokenizer lets you visualize and analyze how LLMs like GPT-4, Claude, and Llama tokenize text. Count tokens, compare models, and optimize your prompts.
Hey Product Hunt 👋
I built PromptTokenizer because I got tired of being surprised by LLM API bills.
A prompt that looked "short" would somehow consume hundreds of tokens. JSON payloads were larger than expected. Code tokenized differently than prose. And the same prompt could cost dramatically different amounts depending on whether I sent it to GPT, Claude, Llama, Gemini, or another model.
Most token counters I found were either:
• Limited to a single provider
• Hidden behind API keys
• Or just gave a number without showing why
I wanted a tool that made tokenization visible.
So I built PromptTokenizer:
🎨 Visualize every token with color-coded chips
🔢 Count tokens
🤖 Support for GPT models today, with Claude, Gemini, Llama, Mistral, and others planned
💰 Spot expensive patterns before they impact your costs
🔒 100% free and privacy-friendly — everything runs in your browser
I use it daily when:
• Designing system prompts
• Optimizing RAG chunk sizes
• Estimating API costs
• Comparing models before deployment
I'd love your feedback:
❓ Which models should I add next?
❓ What features would make this part of your workflow?
❓ What tokenization edge cases have caught you off guard?
Try it here → https://prompt-tokenizer.site/
Thanks for checking it out, and I'm happy to answer any questions in the comments! 🚀
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About PromptTokenizer on Product Hunt
“Count tokens for GPT-4, Claude & more — free”
PromptTokenizer was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #140 on the daily leaderboard. PromptTokenizer lets you visualize and analyze how LLMs like GPT-4, Claude, and Llama tokenize text. Count tokens, compare models, and optimize your prompts.
PromptTokenizer was featured in Software Engineering (42.6k followers), Developer Tools (514k followers) and Artificial Intelligence (471k followers) on Product Hunt. Together, these topics include over 178.9k products, making this a competitive space to launch in.
Who hunted PromptTokenizer?
PromptTokenizer was hunted by Akash Gaur. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Akash Gaur