Free tools
Everything you need to build with AI, from practical calculators and utilities to open-source tools.
CALCULATORS
LLM VRAM calculator
How much GPU memory a model needs to run, read from its GGUF metadata: weights plus KV cache.
CALCULATORS
Fine-tuning GPU memory calculator
GPU requirements for fine-tuning an LLM: full, LoRA, or QLoRA.
UTILITIES
Token counter
Count tokens for GPT, Claude, Llama, and more by pasting text.
UTILITIES
Free OCR
Extract text from images and PDFs with AI-powered OCR.
UTILITIES
Web to Markdown
Turn any web page into clean, LLM-ready Markdown by pasting a URL.
UTILITIES
H100 price tracker
The cheapest rentable H100 & H200 cloud prices right now, spot and on-demand, refreshed live.
OPEN SOURCE
sam3.c
SAM3 segmentation inference in pure C: Metal GPU and multithreaded CPU.
OPEN SOURCE
Limbus
Local-first desktop app for building image segmentation datasets with SAM3.