Use the free Image Pixel Data Exporter below: upload a photo, adjust the settings, and download your result as a PNG. Your image never leaves your browser — all editing happens on your device, and nothing is uploaded to any server.
What Is Pixel Data?
Every digital photo is a grid of tiny squares called pixels. Each pixel has three numbers: red, green and blue, each from 0 to 255. White is 255, 255, 255. Black is 0, 0, 0. Pure red is 255, 0, 0. Those three numbers are the whole photo, repeated millions of times.
The Image Pixel Data Exporter reads those numbers from your photo and gives them to you as a table. You can download the table as CSV, which opens in a spreadsheet, or as JSON, which programmers can load into code. It is a simple way to see, teach and analyse what an image really is.
Why Export Pixel Values?
Students learning about images often hear that a photo is numbers, but they never see the numbers. This tool shows them. Open a small photo, export the data, and you can point at a row and say: this pixel, at this position, is this colour. That makes an abstract idea concrete.
Teachers use pixel tables for lessons on RGB colour, image size and resolution. A 4 by 4 image has 16 rows, which fits on one worksheet. A photo sampled every tenth pixel gives a manageable table even from a large image. Developers use the export to test image code: feed known pixel values into a filter and check the output.
Data analysts use pixel exports to study colour distribution. For example, you can load the CSV into a spreadsheet, average the red column, and find whether a photo is warm or cool overall. Artists use the data to build colour palettes from real photos.
How the Tool Works
The tool loads your photo into a canvas in your browser. It never uploads the photo. It then walks across the photo in steps you choose. With a step of 10, it records every tenth pixel in each direction, which keeps the table small. With a step of 1, it records every pixel, which is only practical for small images.
Each row records the x and y position plus the red, green and blue values and the hex code, like #ff8800. The preview shows the first eight rows and the first 200 rows in the text box, but the downloaded file contains the full sampled set. The maximum width setting limits how large the working copy is, so huge photos stay fast.
How to Export Your Data
Upload a photo. The preview table appears at once. Choose CSV if you want a spreadsheet, or JSON if you want structured data for code. Set the sampling step: 10 is a good default for large photos, 1 for tiny test images. Set the maximum width to control the working size.
Press Download data file to save the full export. The preview image itself can also be downloaded as a PNG, which is handy if you want to show the sampled version next to the table. There is no sign-up and no limit on how many exports you make.
Tips
Start with a small image if you want to inspect every pixel. A 20 by 20 icon gives 400 rows at step 1, which is easy to read. For a normal photo, step 10 or 20 keeps the file readable. If the file is still too big, raise the step or lower the maximum width.
Remember that the sampled rows are a subset, not the whole photo, unless the step is 1. That is fine for analysis, but say so if you share the data: note the step and the working size so others can reproduce your table.
Privacy
Your photo never leaves your browser. The canvas reading and the file export happen on your device. The downloaded file is created locally, and nothing is sent to any server.
Frequently Asked Questions
What is the difference between CSV and JSON? CSV is a plain table for spreadsheets. JSON keeps the same data as labelled objects for programs.
Why are there fewer rows than pixels? Because of sampling. With a step of 10, only every tenth pixel in each direction is recorded. Use step 1 for every pixel.
Can I export a transparent PNG? Yes. The tool reads the RGB values of each pixel. Transparency itself is not exported, only the colour channels.
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