Free AI Helper Tools – Tokens, Costs, Prompts
Plan prompts, estimate costs, prepare datasets and remove personal data before you send anything to a model. Your text and files stay in your browser.
Token CounterExact token counts for GPT models with OpenAI’s tokenizerLLM Cost CalculatorCompare API costs across GPT, Claude, Gemini and moreContext Window PlannerBudget system prompt, docs, history and replyRAG Text ChunkerSplit documents into chunks for embeddingsPrompt Template BuilderReusable prompts with {{variables}} and CSV batchesPrompt LibraryCopy-ready prompts for writing, code and studyJSONL ValidatorCheck fine-tuning and batch JSONL files line by lineFunction Calling Schema BuilderBuild tool definitions for OpenAI, Claude and GeminiPII RedactorRemove personal data before pasting into AIText Similarity CheckerCompare two texts: cosine, Jaccard and edit similarityChat to MarkdownSave ChatGPT and Claude conversations as MarkdownAI Image Size GuideBest sizes for DALL·E, Midjourney, SDXL and FluxPrompt CompressorShorten prompts and save tokensAI Text CleanerRemove Markdown, em dashes and chatbot filler