Image tools / Developer Image Tools
Base64 Image Decoder
Paste a Base64 string or data URI and preview the image.
Base64 Image Decoder is its own job in the catalog (developer): Paste a Base64 string or data URI and preview the image. It is not a copy of the resizer or converter with a new title — the operation is “b64-decode”.
Controls on this page: Base64 or data URI. Output defaults to the format shown.
Processed in your browser. Files are not uploaded.
Runs locally from the values you type.
Related tools
Base64 Image Encoder
Encode a file to Base64. Large files stay in memory on this device.
Image Color Picker
Click a pixel to copy its hex colour.
Image Color Palette Generator
Sample the dominant colours in a photo (simple quantization, not a design-system extractor).
Data URI Generator
Build a data: URI from a file.
SVG Optimizer
Strip scripts, comments and extra whitespace. Not SVGO-complete.
SVG Minifier
Same conservative minify as SVG Optimizer.
Base64 Image Decoder runs in this browser with Canvas. The file is not uploaded to imagecropx. Close the tab and the copy in memory is gone.
What this is not
There is no account and no file locker. If a format cannot be written, the tool says so.
How to use Base64 Image Decoder
- Choose a file for Base64 Image Decoder. It stays on this device.
- Set the controls for this tool (Base64 or data URI).
- Process, then download. Base64 Image Decoder works on one file at a time so the preview stays usable.
Questions about this tool
Does Base64 Image Decoder upload my file?
No. Processing is in this browser.
Can I use this on a phone?
Yes, with the same file-size cap (about 25 MB). A large photo is slower on a phone CPU than on a laptop.
Does Base64 Image Decoder upload the file?
No. This tool runs in the tab. See Privacy for decoder notes (HEIC, PDF.js worker).
What is the file size cap?
About 25 MB per file. Very large pixel counts are rejected so the tab stays responsive.