Base64 to Image Converter
Paste any Base64 string or data URL and preview / download the decoded image. 100% client-side — your data never leaves your browser.
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Paste a Base64 string above and click "Decode Image"
🔒 100% private: All decoding happens in your browser. Your Base64 data never leaves your device.
About Base64 to Image Converter
Base64 is a way to represent binary data (like images) as ASCII text. When you receive an image as Base64 — from an API response, database column, email source, or log entry — you often need to see it as an actual image or save it as a file. This tool decodes Base64 strings back into images. It accepts both full data URLs (data:image/png;base64,...) and raw Base64 strings. It auto-detects the image format from magic bytes when no MIME type is provided, previews the image instantly, shows the estimated file size, and lets you download the decoded image in the original format (PNG, JPG, GIF, WebP, SVG, BMP). Everything runs in your browser — nothing is uploaded to any server.
How It Works
- Paste a Base64 string (raw or data URL) into the input box.
- The image is decoded and previewed instantly.
- Auto-detected: image format (PNG, JPG, GIF, WebP, SVG, BMP) and estimated file size.
- Click "Download" to save the image in its original format.
- Use "Load Sample" to try with a demo image.
✨ Key Features
- ✓Decode raw Base64 strings (without data URL prefix)
- ✓Decode full data URLs (data:image/png;base64,...)
- ✓Auto-detect image format from magic bytes (PNG, JPG, GIF, WebP, BMP, SVG, ICO)
- ✓Live image preview (with checkerboard for transparency)
- ✓Estimated file size (KB/MB)
- ✓Download as original format (auto extension)
- ✓Copy raw Base64 back to clipboard
- ✓Handles large images (up to browser memory limits)
- ✓Clear error messages for invalid input
- ✓100% client-side — no data sent to any server
🎯 Common Use Cases
- →Previewing images from API responses (JSON with base64 field)
- →Extracting images stored in database BLOB/text columns
- →Decoding images from email source (MIME Base64)
- →Saving images embedded in HTML or CSS as data URLs
- →Debugging image data in logs and console output
- →Recovering images from Base64 blobs found online
- →Testing API endpoints that return image data
- →Extracting inline images from exported documents
💡 Advanced Tips & Pro Insights
- ▸Base64 data URLs start with "data:image/png;base64," (or jpg, gif, webp, etc.). The prefix is optional — this tool works with or without it.
- ▸If the MIME type is missing or wrong, this tool auto-detects from the file signature (magic bytes): PNG starts with iVBOR, JPEG with /9j/, GIF with R0lGOD, WebP with UklGR.
- ▸For very large Base64 strings (10MB+), the browser may take a few seconds to decode and render. This is normal.
- ▸Base64 decoded size = base64 length × 3 / 4 (approximately). This tool shows the exact decoded byte count.
- ▸To re-encode the image as Base64, use the "Image to Base64" tool.
Frequently Asked Questions
Is this Base64 to image converter free?▾
Yes, this Base64 to image converter is completely free with no signup, email, or usage limits.
Is my data safe?▾
Yes, 100% safe. All decoding happens in your browser. Your Base64 data is never uploaded to any server.
Which image formats are supported?▾
PNG, JPG/JPEG, GIF, WebP, BMP, SVG, and ICO. The format is auto-detected from the data URL prefix (if present) or the file signature (magic bytes).
Does it work with raw Base64 strings?▾
Yes. Paste either a full data URL (data:image/png;base64,...) or just the raw Base64 string. This tool auto-detects the format from the data itself.
Why does my image fail to decode?▾
Common causes: invalid Base64 characters, missing padding (=), or the string is not actually Base64 image data. Try trimming whitespace, ensuring it starts with valid Base64, and using the correct format.
Can I decode multiple images at once?▾
This tool decodes one image at a time. For batch processing, split your Base64 strings into separate lines and paste each one individually.
Is the download quality the same as the original?▾
Yes. The tool saves the image bytes exactly as decoded from Base64 — no re-encoding, no quality loss.
How do I encode an image to Base64?▾
Use the "Image to Base64" tool (linked in Popular Tools) — it takes any image file and produces the Base64 data URL.