Pixelate an Image Online
Turn a face or sensitive area into a block mosaic — adjustable block size, free, and right in your browser.
ぼかす画像をドロップ
ドラッグ＆ドロップ、貼り付け、またはファイルを選択
PNG · JPG · WebP · GIF · BMP — お使いのデバイスで処理
Why pixelate instead of blur?
Pixelating replaces an area with large mosaic blocks, each block one flat colour. It's the classic 'censored' look you see on TV and in news photos. Compared with a blur, a pixelated area reads more clearly as deliberately hidden — useful when you want it to be obvious that something was removed.
You control the block size with a slider: bigger blocks hide more detail. Pixelate the whole image, or drag a box over just a face, a plate, or a logo. Each block is the average colour of the pixels beneath it, so the result blends naturally with the surrounding image.
How to pixelate an image
- Open your image. Drag it onto the tool, choose a file, or paste it.
- Select the area. Choose Selected areas and drag a box over each part to censor, or use Whole image.
- Set the block size. Slide the block size up until the detail is gone, then download.
Bigger blocks hide more
Small blocks can leave faces or text partly legible. For anything sensitive, increase the block size until you can't make out the underlying detail — or use Redact for a guaranteed solid cover.
pixelate imageの仕組み
- 何をするか
- モザイクのピクセル化（ブロック平均）
- ツールの処理方法
- 本ツールは選択範囲を正方形ブロックの格子に分割し、各ブロックをその下のピクセルのただ一つの平均色で塗りつぶします。これが定番の「検閲」モザイクで、ブロックサイズはスライダーで調整できます（最小2px）。
- 何のためのものか
- ピクセル化は意図的な検閲として明確に伝わるため、何かを隠したと一目で分かるようにしたいときに、顔・ナンバープレート・ロゴを報道風に検閲する定番の選択肢です。
- 元に戻せるか？
- 各ブロックは実際のピクセルの平均なので、小さなブロックでは顔や文字が部分的に読める場合があり、復元された事例もあります。構造が残らなくなるまでブロックを大きくしてください。
ヒント： 下の形が完全に溶けてなくなるまでブロックサイズを大きくしてください。大きなブロック数個の後ろに隠れた顔は、小さなブロック多数の後ろよりはるかに安全です。
More ways to blur & hide
よくある質問
What does pixelating do?
It divides the selected area into a grid of large blocks and fills each one with the average colour beneath it, creating a mosaic that hides fine detail.
Is pixelating safer than blurring?
With large enough blocks it hides detail well, but like blur it can occasionally be partly reversed at light settings. For true secrecy, use the Redact (solid bar) mode.
Can I pixelate only a face?
Yes. Choose Selected areas and drag a box over the face; only that region becomes a mosaic. Add more boxes for more faces.
Where is my image processed?
The blurring happens in your browser, so the new file is created on your own device. How any data associated with the tool is handled is described in our privacy policy.
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