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🖼️ Image to Base64 Converter

Every image format,
every output you need

Resize, compress, convert, and encode images to Base64 — with 10 ready-to-paste output formats, batch mode, and a reverse decoder. All in your browser.

1. Add an Image

5. Base64 to Image (Decoder)

Paste a raw Base64 string or a full Data URI to decode it back into a downloadable image.

🕘 Local History

Saved only on this device (small thumbnails only) — never uploaded anywhere. Click to reload.

No history yet — convert an image above.
How To

How to use every option

  1. Add an image — upload a file, paste a public image URL, paste directly from your clipboard (Ctrl+V), or switch to Batch mode to add several images at once.
  2. Check the preview & info panel — see the image, its original dimensions, file size, and detected format.
  3. Resize — type an exact width/height (lock aspect ratio to keep proportions), or use the scale percentage field instead.
  4. Choose an output format — PNG keeps transparency and is lossless; JPEG and WEBP compress further using the Quality slider.
  5. Rotate, flip, and filter — rotate in 90° steps, flip horizontally/vertically, and apply grayscale, invert, sepia, or a slight blur.
  6. Adjust brightness/contrast or set crop X/Y/Width/Height to cut out a specific region (leave width/height at 0 to keep the full image).
  7. Click "Apply & Generate Base64" to render your changes and produce the encoded output.
  8. Pick an output format pill — Data URI, raw Base64, HTML <img>, CSS background, favicon link, hyperlink, iframe, JS Image object, JS popup snippet, JSON, or XML.
  9. Toggle line-wrap or URL-safe encoding if your destination requires MIME-style 76-character wrapping or a URL-safe alphabet.
  10. Copy or download the output, or download the converted image file directly.
  11. Batch mode — upload multiple images, click Convert All, then download every result bundled into a single ZIP.
  12. Base64 to Image — paste any Base64 string or Data URI into the decoder panel to preview and download it as a real image file.
  13. Local History — every conversion is saved to this device only; click an entry to reload it, or clear history any time.
Capabilities

One tool instead of a dozen converters

🖼️
Wide Format Support
PNG, JPG, WEBP, GIF, SVG, BMP, ICO, TIFF, AVIF, and HEIC selection.
📐
Resize & Crop
Exact dimensions, percentage scaling, and a numeric crop tool.
🗜️
Compression
Adjustable JPEG/WEBP quality with live file-size comparison.
🎨
Filters & Adjustments
Rotate, flip, grayscale, invert, sepia, blur, brightness, and contrast.
📤
10 Output Formats
Data URI, raw Base64, HTML, CSS, JS, JSON, and XML — ready to paste.
🗂️
Batch + ZIP
Convert many images at once and download them all as one ZIP.
↩️
Reverse Decoder
Paste Base64 back in to preview and download the original image.
🔒
100% Private
Every conversion runs locally — nothing is ever uploaded to a server.

Frequently Asked Questions

No. All resizing, compression, format conversion, and Base64 encoding happen locally in your browser using the Canvas API. Images are never uploaded to a server.

Base64 encoding represents binary data as text using 64 printable characters, which increases size by roughly 33%. Compressing or resizing the image first can offset this.

You can select these files, but browser support for decoding them varies — Safari can preview HEIC, while Chrome and Firefox generally cannot. If a file fails to preview, convert it to PNG or JPG first in another app.

Plain Base64, a full Data URI, HTML <img>, CSS background-image, HTML favicon link, HTML hyperlink, HTML iframe, a JavaScript Image object, a JavaScript popup snippet, JSON, and XML.

Yes. Paste an image URL and the tool fetches it directly in your browser. This only works if the source server allows cross-origin (CORS) access.

Yes. Batch mode lets you upload several images, applies the same resize/format/quality settings to each, and lets you download all results together as a ZIP file.

Generally no. Base64 works best for small assets like icons and logos. Larger images are usually better served as separate files so browsers can cache them efficiently.

Yes. Use the Base64 to Image panel — paste a raw Base64 string or a full Data URI, pick the file type, and download the decoded image.

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