Free Developer Utility · No Signup Required
Token Counter & Cost Optimizer
for LLM Prompts
Your prompts never leave your browser
No API callsPrompts stay localRuns in WebAssembly
Real-time calculation
20+ models compared instantly
Optimizer Workspace
Loading tokenizer…
Stays in your browser · No data sent anywhere
0chars0words~0tokens
Optimization
Settings
Token counter
GPT-4o · ~approxSets the tokenizer for input badges and savings stats. Cost chart uses each model's own encoding.
Output length
tok
Run volume
Models
Optimized Prompt
Your prompt, compressed.
Type a prompt on the left. The optimised version with token savings will appear here.
Original Input Tokens
~0
via GPT-4o
Tokens Saved
0
after optimization
Reduction
0%
token compression
Cost per run
Type a prompt to calculate costs
GPT-5.6
OpenAI$0.00
GPT-5.4
OpenAI$0.00
GPT-5.4 Mini
OpenAI$0.00
GPT-5.4 Nano
OpenAI$0.00
GPT-4.1
OpenAI$0.00
GPT-4o
OpenAI$0.00
o4-mini
OpenAI$0.00
Claude Opus 4.8
Anthropic$0.00
Claude Sonnet 5
Anthropic$0.00
Claude Sonnet 4.6
Anthropic$0.00
Claude Haiku 4.5
Anthropic$0.00
Claude Fable 5
Anthropic$0.00
Gemini 3.5 Flash
Google$0.00
Gemini 3.1 Pro
Google$0.00
Gemini 3 Flash
Google$0.00
Gemini 2.5 Pro
Google$0.00
Gemini 2.5 Flash
Google$0.00
Gemini 2.5 Flash-Lite
Google$0.00
Llama 4 Maverick
$0.00
Llama 4 Scout
$0.00
Mistral Medium 3.5
Mistral$0.00
Ministral 14B
Mistral$0.00
DeepSeek V4 Flash
DeepSeek$0.00
DeepSeek V4 Pro
DeepSeek$0.00