Free tools
Free AI, developer and business tools
Free tools that run in your browser: AI prompts, tokens and costs, RAG chunking, tool schemas, JWTs, JSON, Base64, timestamps, UUIDs, hashes, IMEI numbers, WhatsApp links and passwords. Nothing you type is uploaded.
AI tools
AI prompt generator
Turn a rough idea into a clear, structured prompt: say who the AI should be, what to do, what it needs to know and how to answer.
Open tool →LLM token counter
Paste text to estimate its token count, see words and characters, and check how much of a model's context window it would use.
Open tool →AI API cost calculator
Estimate what an AI feature or chatbot will cost each month from how many requests it handles and how long they are.
Open tool →RAG text chunker
Split a document into chunks for retrieval-augmented generation, with the chunk size and overlap you choose, and preview every chunk.
Open tool →AI tool schema generator
Paste an example of the JSON your AI tool should receive, and get a JSON Schema or a complete Claude tool definition for function calling.
Open tool →Developer tools
JWT decoder
Paste a JSON Web Token to read its header and payload, and see when it was issued and when it expires.
Open tool →JSON formatter and validator
Paste JSON to format it with readable indentation, minify it to one line, or find exactly where it is broken.
Open tool →Base64 encoder and decoder
Encode text to Base64 or decode Base64 back to text, including emoji and non-English characters, with an optional URL-safe format.
Open tool →Unix timestamp converter
Convert a Unix timestamp (epoch time) to a readable date, or a date to a timestamp, and see the current time in seconds and milliseconds.
Open tool →UUID generator
Generate random version 4 UUIDs, one at a time or in bulk, and copy them in the format you need.
Open tool →SHA-256 hash generator
Type or paste text to get its SHA-256, SHA-1, SHA-384 and SHA-512 hashes instantly.
Open tool →Business and everyday tools
AI chatbot ROI calculator
See how many hours and how much money an AI chatbot on WhatsApp, Telegram or your website could save your team each month.
Open tool →WhatsApp link generator
Create a link that opens a WhatsApp chat with your number and an optional message already typed in.
Open tool →IMEI checker
Check whether a phone's IMEI number is valid, and see which part identifies the model.
Open tool →Password generator
Create strong random passwords on your own device, with the length and characters you choose.
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