Paste a Base64 string or data URI and get the real image back to preview and download — on your device, nothing uploaded.
Paste Base64 below, or drop a text file · decoded on your device, nothing uploaded
No size limit · files are processed on your device and never uploaded · how it works
Decodes a Base64 string or full data URI back into a real image you can preview and download. The reverse — image to Base64 — is one click. Runs in your browser.
Runs in your browser. Files are never uploaded — you can go offline after the page loads.
How to use the Base64 to Image
Paste a Base64 string or data URI, or drop a .txt file.
See the decoded image, its format and size.
Download the image.
Easy to use
Drop files, pick options, download. Whole folders at once, no signup, no daily limit.
Best quality
The same engines the professionals use — SVGO, resvg, MozJPEG, libwebp, libavif — compiled to run in your browser.
Private & secure
Files are processed on your device and never uploaded. Close the tab and nothing remains anywhere.
Base64 back into a real image
Data URIs are handy for embedding images in HTML, CSS or JSON, but at some point you need the file back. Paste the
full data:image/…;base64,… string or just the Base64 payload and it's decoded into a real image you can
preview — with its detected format, dimensions and size — and download. PNG, JPG, WebP, GIF, SVG, BMP and ICO are
all recognised.
Decoding happens entirely in your browser, so even sensitive assets stay on your device. Going the other way?
Image to Base64 is one click.
Frequently asked questions
Do I need the data: prefix?
No — paste either the full data URI (data:image/png;base64,…) or just the Base64 payload; the format is detected from the prefix when present, otherwise PNG is assumed.
Most online converters upload your file to a server. InfyTool ships the actual encoders to your browser as WebAssembly instead, so processing happens inside your tab — faster for batches, and nothing to delete afterwards.
No upload, ever. Turn off Wi-Fi after the page loads and every tool keeps working.
No limits. No file-size cap, no queue, no watermark, no account.
Runs on your CPU. Batches use several cores in parallel; nothing is throttled.