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Paste text, paste Base64 code, or upload an image file to encode or decode
Click "Encode" to convert text/image to Base64, or "Decode" to restore original content
View the encoded or decoded output instantly in the result area below
Copy the result to clipboard or download as a text file
Our free Base64 encoder and decoder online tool converts text, files, and images to/from Base64 format directly in your browser. No data is uploaded to any server — everything happens locally on your device, making it completely private and secure.
Base64 encoding is commonly used to embed binary data (like images) into text formats such as HTML, CSS, JSON, or XML. Use our online Base64 converter to encode images for data URIs, decode Base64 strings back to their original format, or safely transmit binary data as text.
Base64 is a binary-to-text encoding that represents binary data using 64 printable ASCII characters. It lets you drop an image or file into a text-only context such as HTML, CSS, JSON, or an email. Our free Base64 encoder and decoder does the conversion in your browser, so the data you paste never leaves your device.
Switch to the Text tab, paste your string, and click Encode to Base64 or Decode from Base64 — the result appears instantly. On the Image tab you can upload a picture to get a Base64 data URI, or paste a data URI to preview and download the original image. If you work with other encodings, the URL encoder and HTML entity encoder cover adjacent formats.
Text encoding simply transforms characters; image encoding turns a file into a data:image/png;base64,... string you can embed directly in markup. Images grow by about a third when Base64-encoded, so it is best for small icons rather than large photos. For structured data that wraps Base64, our JSON formatter keeps payloads readable.
Base64 is encoding, not encryption. Anyone can decode it, so never use it to protect secrets. For design assets, pair it with the SVG editor or color picker when building markup.
Base64 is a binary-to-text scheme that converts binary data such as images or files into 64 ASCII characters. It is used to embed binary inside text formats like HTML, CSS, JSON, or email.
Paste your text in the input box, switch to the Text tab, and click Encode to Base64. The result appears instantly and can be copied with one click. Everything runs in your browser.
Open the Image tab, upload or drop an image, and the tool returns a Base64 data URI you can paste into HTML as an img src or into CSS as a background.
No. Base64 is encoding, not encryption — anyone can decode it back to the original. Use it for transport, not for protecting sensitive data.
Embedding images in HTML/CSS, transmitting binary through JSON APIs, encoding email attachments (MIME), storing small images in databases, and passing binary inside URLs.
No. Encoding and decoding happen locally in your browser. Your text and images are never sent to a server.
Base64 expands data by about 33 percent because every 3 bytes become 4 characters. That overhead is normal and expected.
Yes. Paste the data URI into the Image tab's decode box and click Generate Image to preview it, then download the file.
Yes. It is free, works online, and needs no signup. There is no watermark on anything you generate.
PNG, JPG, GIF, SVG, and WebP up to 5 MB are supported for the image-to-Base64 feature.
