Free tools
Tools for people building agents.
Debug a log, count tokens, compare prices, check a prompt, fix JSON. No sign-up, and nothing you paste leaves your browser.
10 free tools / no sign-up
Pick up a tool.
Find what broke
Debug / 1Know what it costs
Cost / 4- 02Token counterPaste text. See the token count and price on GPT, Claude, Gemini and Llama.Open
- 03Model price comparisonEvery model's price in one table, plus what your app costs per month on each.Open
- 04Prompt cost checkerPaste a prompt. Get a shorter, cheaper version and what it costs on each model.Open
- 10AI cost estimatorWhat will my agent cost per run, per task and per month?Open
Check before you ship
Build / 4- 05Context window checkerDoes my document fit in each model's memory?Open
- 06Tool definition checkerPaste your tool setup. Find the mistakes that make agents fail.Open
- 08JSON fixerPaste broken AI output. Get valid JSON back.Open
- 09Rate limit calculatorHow many users can my app handle before I hit my limits?Open
Watch what is up
Live / 1Checking once is good. Tracking always is better.
Tracify records every run, so cost, speed and failures are always one click away.