Screenshot to Base64

Convert a Screenshot Directly to a Base64 Data URI

Screenshots are PNG files by default on most operating systems, and PNG files are binary data. Base64 is the standard way to represent binary data as plain text so it can be embedded in HTML, CSS, JSON, or any other text-based context. This tool takes your screenshot (or any PNG image) and converts it to a Base64 data URI you can paste directly into code.

The output format is: data:image/png;base64,iVBORw0KGgoAAAA.... This string can go into an <img src=""> attribute, a CSS background-image property, an API request body, a JSON field, or anywhere else an image URL would normally appear.

Common Developer Workflows for Screenshot Base64 Conversion

Embedding screenshots in HTML bug reports and documentation. When filing issues on GitHub, Jira, Confluence, or internal wikis, you sometimes need to include a screenshot in a way that the destination system stores it reliably rather than as a broken external link. A Base64-embedded image is self-contained — the image data is part of the document itself, not a reference to a file that might move or become inaccessible.

Automated testing and visual regression. Browser automation frameworks like Playwright and Selenium capture screenshots as part of test runs. These screenshot files sometimes need to be included in test reports, CI artifacts, or API payloads as Base64 strings. Converting a captured screenshot to Base64 and embedding it in a report keeps the visual evidence self-contained with the test results.

API calls that accept image data as Base64. AI vision APIs, OCR services, image analysis endpoints, and document processing APIs often accept image input as Base64 in the request body rather than as a file upload. Converting your screenshot to Base64 is a required step before including it in these API calls.

Pasting screenshots into email or messaging HTML templates. Email clients frequently block externally loaded images but display embedded Base64 images immediately. Converting a screenshot of an interface, chart, or design mockup to Base64 lets you include it in an HTML email without relying on external hosting that may be unavailable when the recipient opens the message.

Screenshot-Specific Considerations

Screenshots differ from photographs in ways that affect Base64 encoding choices. Screenshots are typically PNG files because PNG’s lossless compression preserves sharp edges, text, and UI element boundaries exactly — JPEG compression would introduce visible artifacts around text and sharp contrasts that look particularly bad in screen captures.

Because screenshots tend to be large (full screen resolutions of 1920×1080 px or higher are common), the Base64 output will be substantial — a typical full-screen screenshot in PNG format converts to a Base64 string of several hundred kilobytes to several megabytes. For embedding in code, this is workable but worth being aware of if you are pasting the string into a version-controlled file.

If the screenshot includes only a specific region of interest, crop it before converting. A 400×300 px crop of the relevant UI area produces a Base64 string roughly 10× smaller than the full 1920×1080 px original, with no loss of relevant content.

File Format and MIME Type

The data URI prefix specifies the image format: data:image/png;base64, for PNG, data:image/jpeg;base64, for JPEG. Screenshots are almost always PNG. If you are converting a JPEG screenshot (some screen capture tools save as JPEG), use the correct MIME type in your data URI or the browser may not render it correctly.

This tool outputs the correct MIME type based on the file you provide. For PNG input, the output prefix is data:image/png;base64,. For JPEG input, it is data:image/jpeg;base64,.

Your Screenshot Never Leaves Your Browser

Screenshots often contain sensitive information — internal applications, personal data, credentials visible in a UI, confidential business information. The conversion runs entirely in your browser using the FileReader API. Your screenshot is read into browser memory and the Base64 output is generated locally, with no server upload at any point. Close the tab and both the original and the Base64 string are gone from this tool.