Compress Image Online
無料のオンライン画像圧縮ツール。JPG・PNG・WebP・GIFを最大90%圧縮、画質を維持。アップロード不要・登録不要。
ツールを開くimage
写真に透かしを入れる オンライン無料 - 文字・ロゴ透かしツール
写真にオリジナルの文字やロゴの透かしを追加。不透明度・サイズ・回転・位置の調整、敷き詰め、複数画像の一括処理に対応。
画像をドロップまたはクリックしてアップロード
または
ファイルを選択使い方
- 1 Upload one or more photos.
- 2 Add a text or logo watermark and adjust its style, position, and opacity.
- 3 Download the watermarked photo one at a time or export all in a batch.
機能
Text and logo watermarks with custom font, color, size, opacity, and rotation
Single placement at nine positions or a tiled pattern across the whole photo
Apply the same watermark to unlimited photos in one batch export
Export at full original resolution as JPG, PNG, or WebP
よくある質問
Are my photos uploaded to a server?
No. The watermark is rendered entirely in your browser, so your photos never leave your device.
Can I add the same watermark to multiple photos at once?
Yes. Upload multiple photos, configure the watermark once, then click "Download all" to process every photo with the same settings.
Will the watermarked photo lose quality?
Photos keep their original resolution. JPG and WebP use a high-quality encoder; choose PNG for fully lossless output.