Tools · free · runs in your browser
Small tools for people who work with AI.
Build a prompt that gets a better answer, count tokens before you paste, estimate what an API bill would look like, and clean up chatbot output before it goes into an email. Nothing you type leaves your device.
Write better prompts
AI Prompt Generator
Answer a few fields and get a clear, structured prompt for ChatGPT, Claude, Gemini, or any chatbot.
System Prompt Generator
Turn a handful of answers into a system prompt for a custom assistant, GPT, or persona.
AI Image Prompt Generator
Describe the picture in your head field by field and get a prompt any image model can use.
Measure and budget
Token Counter
Estimate how many tokens your text uses and how it fits common context windows.
AI API Cost Calculator
Turn token counts and per-million-token prices into a cost per request, per day, and per month.
Word Counter
Live counts for words, characters, sentences, and paragraphs, plus reading time and keyword density.
Character Counter
A live character count with limit bars for every platform you post to.
Clean up the output
AI Writing Checker (Words to Avoid)
Highlight the words and phrases that make writing read as machine-made, and see what to say instead.
Text Cleaner (Remove Line Breaks & Formatting)
Strip line breaks, markdown, smart quotes, and emoji from pasted text in one click.
Markdown to Plain Text
Paste markdown, get clean plain text with the structure kept and the symbols gone.
Case Converter
Switch text between ten cases, from Title Case to snake_case, and copy the result.
Take a quiz
Frequently asked questions
- Are these tools really free?
- Yes. They run in your browser, need no account, and have no usage limits.
- Is my text uploaded anywhere?
- No. Every tool on this page does its work on your device. Nothing you paste is sent to ChatUp or to any AI provider.
- Do the counters match what ChatGPT or Claude count?
- Word and character counts are exact. Token counts are estimates, because each provider uses its own tokenizer; expect a few percent of difference.
- What is the difference between the tools and ChatUp itself?
- The tools prepare and tidy text without an AI model. ChatUp is where the models live: paste the prompt you built here and run it on GPT, Claude, Gemini, Grok or DeepSeek.
Do it in ChatUp
Run your prompt on five models.
ChatUp puts GPT, Claude, Gemini, Grok and DeepSeek in one chat, with tools for images, video, voice, documents and research. Same account on web, iPhone and Android.