Image Tools
Image to Base64
Encode validated original JPEG, PNG, or WebP bytes as a Data URL or raw Base64.
Enter the values and review the result.
Image and output mode
The calculator makes no file-upload or conversion request and does not intentionally store selected image data.
One static JPEG, PNG, or WebP; 1 byte–8 MiB; at most 8192 px per side and 16000000 pixels.
Validate an image, choose a mode, then encode its original bytes.
Original-byte Base64 encoding
The route verifies MIME, signature, static structure, stored dimensions, decoded dimensions, and browser decoding before encoding. It then maps the original accepted bytes to canonical RFC 4648 Base64.
A Data URL is exactly data:<verified MIME>;base64,<payload>. Raw mode returns only the payload. No labels, wrapping, or trailing newline are copied.
Worked example and limitations
A validated PNG begins with the Data URL prefix data:image/png;base64,. Its exact output depends on every original byte and is typically about one-third larger than the binary file before the prefix.
The preview uses a separate local object URL instead of duplicating the large Data URL. Generated output remains on this device unless copied. Base64 does not hide sensitive information and is not a privacy, deletion, or security guarantee.
Quick answers
What this calculator answers
- Purpose: Encodes the original validated bytes of one static JPEG, PNG, or WebP image.
- Output: Choose an exact Data URL or canonical raw Base64 payload; Copy adds no labels or whitespace.
- Boundary: Base64 increases text size and is encoding, not compression or encryption.
Transparency note
Accuracy and limitations
Calzivo tools are built for practical estimates, conversions, and checks. Some tools use standard formulas or simplified assumptions, and results can be affected by input accuracy, rounding, units, local rules, or changing official requirements.
File and image results can vary by file structure, browser support, size, fonts, compression, and format limits. Review downloaded files before using or sharing them, and avoid sensitive files unless you understand how the tool handles them.
Reference check
Sources and references
These references provide background context for the topic. They do not replace official advice or documents for personal decisions.
- File API
World Wide Web Consortium
- RFC 4648: Base64 Data Encoding
RFC Editor
- Image media types
Internet Assigned Numbers Authority
How to Use This Tool
Use these steps to enter the right inputs and interpret the result correctly.
Choose one static JPEG, PNG, or WebP image.
Select Data URL or Raw Base64 output.
Choose Encode Image, then copy the exact contained text or Reset.
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Related Guides
Background reading and explanations related to Image to Base64.
Frequently Asked Questions
Common questions about Image to Base64 and how to read the result.
Does encoding change the image bytes?
No. After validation, this route encodes the accepted original bytes rather than canvas-re-encoding them.
Is Base64 compression or encryption?
No. Base64 represents binary bytes as text, normally increasing size, and anyone with the text can decode it.
Can metadata remain?
Yes. Because the original accepted bytes are encoded, embedded metadata may remain in the Base64 output.
Which images are accepted?
Only static JPEG, PNG, and WebP within the byte, dimension, pixel, signature, and browser-decode limits. SVG and animated images are rejected.