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caption.now

Free
Development Tools

caption.now helps you quickly and efficiently caption an image dataset for AI training. Machine-learning practitioners, researchers, and dataset curators can label images at speed, producing the text captions needed to train or fine-tune vision and image-generation models, with the emphasis on making a normally repetitive annotation workflow fast.

Catalogued August 3, 2026 · Curated by PWA Directory team
Online Only
Installable
Cross-Platform
Free

Not sure how to add caption.now to your home screen? Step-by-step for Chrome, Safari, Firefox and Edge — it takes about ten seconds, and there is no app store involved.

Own caption.now? Have us re-run this measurement — we open it in a real browser, cut the network, and send you what survived.

Tags
image-labelingdataset-annotationai-trainingmachine-learningcomputer-visioncaptioningpwa

How to install caption.now as a PWA

Chrome / Edge
Menu (⋮) → Add to Home screen
Safari (iOS)
Share (↑) → Add to Home Screen
Firefox
Menu (⋮) → Install

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