画像 to Base64 変換
「画像 to Base64 変換」は画像とデザインに使えるブラウザツールです。入力内容と結果は通常この端末内で処理され、登録は必要ありません。
JPEG, PNG, GIF, WebP, or SVG up to 10 MB. Processing stays in this browser.
使い方
使い方
- Choose a common image file up to 10 MB.
- Select Base64 body or complete data URL and review the generated output.
- Copy the result, download it as a text file, or clear the page.
A local image encoder
The selected file is read with the browser FileReader API. The image bytes are converted to Base64 on this device; Hello Keyboard Tools does not upload, store, or inspect the image contents.
Keep output limits in mind
JPEG, PNG, GIF, WebP, and SVG files up to 10 MB are accepted. Base64 is about one third larger than the original bytes, so the generated text can be too large for some HTML attributes, CSS declarations, or request headers.
よくある質問
あわせて知りたいこと
What is the difference between Base64 and a data URL?
Base64 output contains only the encoded image bytes. A data URL includes the MIME type and the base64 prefix, such as data:image/png;base64, before those bytes.
Which image files are supported?
JPEG, PNG, GIF, WebP, and SVG files up to 10 MB are supported. The browser-reported MIME type must be an image type.
Does my image leave my device?
No. Reading, encoding, copying, and downloading happen locally in your browser. Nothing is sent to Hello Keyboard Tools.