FastLabel

FastLabel is the fastest way to label image datasets on your iPhone.

Import a ZIP with images, define your labels, and start labeling instantly. Designed for speed and simplicity, FastLabel lets you go through large datasets quickly with a smooth, one-by-one workflow.

Features: • Import images from ZIP files (JPG, PNG, JPEG) • Fast, focused labeling experience • Simple label set creation • Overview of all images in a grid • Continue where you left off • Export labels as JSON, CSV, or JSONL • Optionally export images together with labels

Perfect for: • Machine learning datasets • Computer vision projects • AI training data preparation • Quick annotation tasks on the go

All data stays on your device. No accounts, no uploads, no tracking.