Base64 to Image Converter — Preview and Download
What is Base64 to Image Converter — Preview and Download
This tool decodes a Base64-encoded string back into a viewable image directly in your browser. Paste any Base64 string (with or without the data URL prefix like data:image/png;base64,) and instantly see the image it represents. You can then download the image to your device. This is the reverse operation of image-to-Base64 encoding, useful for inspecting API responses, debugging multimodal LLM outputs, or recovering images from Base64 strings in data files.
How to use
- Paste the Base64 string into the input field — with or without the data URL prefix.
- Click Preview image to decode and display the image.
- Inspect the preview to verify the image is correct.
- Click Download image to save it to your device.
When to use it
Got a multimodal AI API response with a Base64 image buried in the output field? Paste the string here and you see the image the model produced right away, then download it in one click, no decode script required. It works the other way too: drop in a string to confirm your image-to-Base64 conversion came out right before you send it to an API.
Frequently asked questions
Does the tool need the data URL prefix?
No. You can paste either a full data URL (data:image/png;base64,ABC...) or just the raw Base64 string (ABC...). The tool auto-detects the format and adds the prefix if needed. It also tries to detect the image type from the Base64 data itself.
Which image formats can be decoded?
Any image format the browser can display: PNG, JPG, GIF, WebP, SVG, and BMP. The format is detected from the data URL prefix or from the Base64 magic bytes (first characters of the encoded data).
What does 'auto-convert on paste' mean?
When you paste a Base64 string into the input field (Ctrl+V or Cmd+V), the tool automatically tries to decode and preview the image without requiring you to click the button. This speeds up the workflow when inspecting multiple Base64 strings.
Is there a size limit for Base64 strings?
No server-side limit. The decoding runs entirely in your browser. Very large Base64 strings (representing images over 10 MB) may cause a brief delay, but there is no hard restriction.
Is my data sent to a server?
No. Everything runs locally in your browser. The Base64 string never leaves your device.
Related tools
Image to Base64 Converter
Convert any image to Base64 string online. PNG, JPG, GIF, WebP, SVG supported. Get the data URL or raw Base64 for AI API calls and multimodal LLMs. Free, browser-only.
Background Remover
Remove the background from any image online and get a transparent PNG. Runs in your browser with AI, your photo is never uploaded. Free.
Color Palette Extractor
Upload any image and instantly extract its dominant color palette. Get HEX, RGB, and HSL values for up to 10 colors. Free, client-side.