AI Image Analyzer: Describe an Image, Read Its Text and Ask Questions About It
The VdoBloom AI Image Analyzer is an online tool that looks at a picture and writes back what it sees. Upload a photo, screenshot or illustration (up to 10 MB), pick one of five analysis types (Description, Object Detection, Text Extraction, Face Detection or Color Analysis) and, if you like, type your own question about the image. The answer comes back as plain text you can copy in one click.
Each analysis costs 2 credits and runs on Google’s Gemini 2.5 Flash vision model. New accounts get 10 free credits, which covers five analyses, and if an analysis fails the credits are refunded automatically. There is no subscription requirement and nothing to install; it works in the browser on desktop and phone.
It is useful for anyone who needs words for a picture: writing alt text and captions, pulling text out of a screenshot or sign, cataloguing product or stock photos, checking what is in an unfamiliar image, or getting a written colour palette for a design brief.
Examples
Color Analysis of a chameleon photo: palette, dominant colours and contrast
How it works
- 1
Upload an image
Click the upload box and choose a JPG, PNG, WebP or other common image file up to 10 MB.
- 2
Choose the analysis type
Pick Description for a full write-up, or Object Detection, Text Extraction, Face Detection or Color Analysis for a focused report.
- 3
Ask a question (optional)
Type a specific question in the custom prompt box, such as “What brand is the laptop?” or “Write alt text under 125 characters.”
- 4
Analyze and copy
Press Analyze Image. The result appears on the right in a few seconds; press Copy to put it on your clipboard.
Why use this tool
Five analysis modes
One tool covers general description, object listing with locations, word-for-word text extraction, face and expression reading, and colour palette analysis.
Ask your own questions
The custom prompt is added to whichever mode you pick, so you can narrow the answer to exactly what you need instead of reading a generic label list.
Readable written answers
Results are full sentences, not just tags with confidence scores, which makes them ready to paste into alt text, captions, notes or reports.
Low, fixed price
Every analysis is 2 credits whatever the image or mode, and the cost is shown next to the Analyze button before you run it.
Automatic refunds
If the vision model returns an error, the 2 credits go back to your balance without a support request.
What is an AI image analyzer?
An AI image analyzer uses a vision-language model to read the contents of a picture and describe them in words. Older image-recognition tools returned a short list of labels such as “dog, grass, outdoor”. Vision-language models go further: they describe how objects relate to each other, read printed text, comment on style and lighting, and answer follow-up-style questions written in plain language.
The phrase is also used for a different kind of tool: detectors that estimate whether an image was made by AI. The VdoBloom analyzer is not one of those. It describes what is in an image; it does not score whether the image is real or generated.
Is the AI image analyzer free?
You can try it free. Every new VdoBloom account gets 10 free credits and one analysis costs 2, so you can analyze five images before paying anything. After that, the Lite pack is 300 credits for $19.50 as a one-time purchase, or $15 a month as a subscription. One-time credits never expire; subscription credits reset each billing cycle. The same balance works across all VdoBloom image, video and audio tools.
| What you run | Credits | With 10 free credits | With Lite (300 credits) |
|---|---|---|---|
| One image analysis, any mode | 2 | 5 analyses | 150 analyses |
| Analysis with a custom question | 2 | 5 analyses | 150 analyses |
| A failed analysis | 0 (refunded) | No charge | No charge |
| Copying the result | 0 | Free | Free |
The five analysis types and when to use each
Each mode sends the model a different instruction. Pick the one that matches the output you want, then add a custom question to narrow it further.
| Analysis type | What it returns | Good for |
|---|---|---|
| Description | A detailed written description of the whole image, or the answer to your custom question | Alt text, captions, understanding an unfamiliar image |
| Object Detection | Every object it can identify, with where it sits in the frame and its characteristics | Cataloguing, inventory photos, product listings |
| Text Extraction | All visible text, written out as it appears | Screenshots, signs, labels, menus, slides |
| Face Detection | How many people appear, with expressions, emotions and estimated age for each | Describing group photos, checking a portrait’s mood |
| Color Analysis | The palette, dominant colours, colour harmony and the mood the colours create | Design briefs, brand checks, matching a reference look |
How to describe an image with AI for alt text
Alt text tells screen-reader users and search engines what an image shows. To get usable alt text, upload the image, keep the mode on Description and add a custom prompt such as “Write one sentence of alt text, under 125 characters, describing the main subject and action.” The analyzer returns a single line you can paste into your website, CMS or social post.
For longer descriptions, such as a product page or an accessible description of a chart, ask for a paragraph instead and name what matters: “Describe this chart: the title, axes, and the main trend.” Always read the result before publishing; a person who knows the context should confirm names, numbers and anything the model may have guessed.
Questions you can ask the analyzer
The custom prompt accepts any question about the image. A few that work well:
- “What is written on the sign in the background?” (Text Extraction)
- “List every item on the desk and where it is.” (Object Detection)
- “Write an Instagram caption for this photo in a friendly tone.” (Description)
- “What time of day and season does this photo look like?” (Description)
- “Give me the five main colours as hex-style descriptions and a mood.” (Color Analysis)
- “How many people are in this photo and what are they doing?” (Face Detection)
- “What art style is this illustration closest to?” (Description)
Who uses an image analyzer
Most uses come down to turning pictures into text that can be searched, read aloud or reused.
- Website owners and marketers writing alt text and image captions.
- Online sellers describing product photos and checking what a listing image shows.
- Students and researchers getting a description of a figure, diagram or historical photo.
- Designers extracting a colour palette from a reference image.
- Office workers copying text out of a screenshot or a photo of a whiteboard.
- AI artists studying an image before recreating it; for a ready-to-use generation prompt, Image to Prompt is the better fit.
Image Analyzer vs Image to Prompt
Both tools read an image with a vision model, but they write for different readers. The analyzer writes for people: explanations, answers, extracted text and reports. Image to Prompt writes for an image generator: a dense prompt describing subject, framing, lighting and style, with a button to continue straight into Image Edit.
| Image Analyzer | Image to Prompt | |
|---|---|---|
| Output | Readable description or answer | A text prompt for image generation |
| Modes | Description, objects, text, faces, colours, custom question | One mode |
| Credits | 2 per image | 6 per image |
| Best for | Alt text, OCR, cataloguing, questions | Recreating or restyling a look |
Read more: Image to Prompt · Guide: image to prompt
Tips for accurate results, and the limits
Clear, well-lit, higher-resolution images give the most accurate answers, and small text is read best when it is in focus and not at a steep angle. A specific question gets a more useful answer than an open one.
Limits to know: one image per analysis, files up to 10 MB, and no batch upload. The analyzer does not detect whether an image is AI-generated, does not identify who a person is, and can misread handwriting, very small print or crowded scenes. Treat its output as a strong first draft and check facts that matter. Only upload images you have the right to share.
Frequently asked questions
Can AI describe an image for me?
Yes. Upload the image to the VdoBloom AI Image Analyzer, leave the mode on Description and press Analyze Image. Gemini 2.5 Flash writes a detailed description of the scene, objects, people, colours and any visible text, and you can copy it in one click. Each analysis costs 2 credits.
Is there a free AI image analyzer?
VdoBloom gives new accounts 10 free credits and an analysis costs 2, so your first five analyses are free. After that, the Lite pack is 300 credits for $19.50 one-time, which covers 150 analyses.
Can the image analyzer extract text from a photo?
Yes. Choose the Text Extraction mode and the analyzer writes out all visible text as it appears in the image. It works on screenshots, signs, labels and documents; clear, in-focus text is read most reliably.
Can it tell if an image is AI-generated?
No. The VdoBloom analyzer describes what an image contains. It is not an AI-image detector and does not give a real-or-generated score.
Can I ask a specific question about an image?
Yes. Type your question in the Custom Analysis Prompt box before pressing Analyze Image. The question is combined with the selected mode, so you can ask things like what a sign says, how many people are present or what style an illustration uses.
Which AI model does the image analyzer use?
It uses Google’s Gemini 2.5 Flash, a fast vision-language model, accessed through OpenRouter. The model is fixed for this tool, so the price stays at 2 credits per analysis.
What file types and sizes are supported?
Any common image format your browser can upload, including JPG, PNG and WebP, up to 10 MB per image. Photos, screenshots, illustrations and AI-generated images all work.
Can it write alt text?
Yes. Use the Description mode and add a custom prompt asking for one sentence of alt text under 125 characters. Review the line before publishing so names and details are correct.
Does the analyzer recognise people’s faces?
Face Detection counts people and describes expressions, emotions and estimated age. It is not a face-recognition tool and is not meant to identify who someone is.
How is the analyzer different from Image to Prompt?
The analyzer writes human-readable descriptions, answers and extracted text for 2 credits. Image to Prompt writes a generation prompt for recreating the image in an AI image tool, for 6 credits, and opens it in Image Edit in one click.