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Image Captioning

Caption an image

Get a quick description of an image for alt text drafts or notes. Processing stays in your browser.

Runs in your browser. Your images stay on this device — nothing is uploaded for processing.

Alt-text helper

Draft a starting caption you can edit.

Local cues

Uses dimensions, palette, and brightness signals.

Editable output

Tweak the text before you copy it.

No upload

The image never leaves this tab.

Use the tool

How it works

Descriptions without a vision API bill

We analyze basic visual signals in-canvas and compose a readable caption you can refine.

Before you start

  • This is a lightweight local captioner — not a cloud vision model.

Three steps

  1. 1

    Load an image

    Drop a photo or graphic.

  2. 2

    Generate

    Create a draft caption locally.

  3. 3

    Copy or edit

    Use it as alt text or notes.