About image to Base64
Data URLs embed binary file bytes directly inside text—common in HTML email, inline icons, or quick demos. This utility reads an image you select from disk, converts it to a Base64 payload prefixed with the correct MIME type, and exposes both the full Data URL and the raw Base64 segment for APIs that expect only the encoded bytes.
The preview thumbnail helps confirm you picked the right asset before you paste a multi-kilobyte string into Slack or a ticket. Because FileReader runs locally, your intellectual property never traverses our application servers as part of this conversion.
When this page shines
- Generating inline assets for prototypes when a CDN is not wired up yet.
- Comparing encoded size across PNG versus WebP exports.
- Teaching teammates how MIME prefixes pair with Base64 payloads.
How to use this page
- Click Choose image and pick a raster file from your device.
- Wait for the preview and Data URL field to populate.
- Copy either the Data URL (for CSS/HTML) or the raw Base64 (for JSON APIs).
- Clear when finished so the next person using the workstation does not see your asset.
Performance guidance
Large photos expand into very long strings and may lag the editor. Resize images in a dedicated tool before encoding when possible.
Frequently asked questions
- Do you upload my file?
- No. The browser reads bytes locally and discards them when you refresh or clear.
- Why is the string so long?
- Base64 expands binary size by roughly four thirds plus the MIME prefix.
- Can I encode SVG?
- Yes if the browser recognizes the MIME type, but remember SVG can contain scripts—only encode trusted files.
- Does this strip EXIF metadata?
- The Base64 reflects the file bytes as read; metadata embedded in the file remains unless you preprocess the image elsewhere.