DJAI Academy 使用免費工具
DJTool by DJAI

免費 JPG、PNG、WEBP 與 HEIC 圖片工具

圖片壓縮，免費在瀏覽器中處理

圖片壓縮，不必註冊、沒有浮水印，圖片會留在你的裝置上，不會上傳到 DJAI 伺服器。

✓ 不必註冊 ✓ 瀏覽器內處理 ✓ 免費使用
處理圖片
圖片工具

縮小檔案，同時保留實用畫質。

Choose one image or a batch and select the output you need. Everything happens locally on your device.

DJAI Image ToolsJPG, PNG, WebP & HEIC
私密且在裝置端處理

🔒 圖片不會離開瀏覽器。DJAI 不會上傳、儲存或查看你的檔案。

工具說明

如何使用圖片壓縮工具

選擇裝置中的圖片，確認格式、尺寸或畫質設定，在瀏覽器完成處理後檢查實際輸出再下載。

  1. 從裝置選擇圖片
  2. 調整格式、尺寸或畫質
  3. 處理、檢查並下載結果
使用方式

三個步驟完成圖片處理。

01

選擇圖片

Upload a JPG, PNG, or WebP file directly from your device.

02

Pick a resize method

Set a target KB, use a percentage, or enter exact dimensions.

03

Download the result

Preview the new file size and save the optimized image instantly.

PRIVATE BY DESIGN

Your pictures stay yours.

The complete resize process happens on your device using modern browser technology. There is no upload queue, server storage, or account database.

✓ Local browser processing ✓ Automatic metadata removal ✓ Analytics receives no filenames or image contents
常用圖片工具

Choose a common conversion, compression, or resize workflow. Every page uses the same private browser-based processing engine.

Remove backgroundDownload transparent PNG JPG to PNGFree conversion PNG to JPGQuality control JPG to WebPFor faster websites WebP to JPGWider compatibility Image to 100 KBFor upload forms HEIC to JPGiPhone photos AVIF to JPGWider compatibility Image to 200 KBPreconfigured target Passport photo35x45 and 2x2 inch
FAQ

圖片處理常見問題

Can the tool make an image exactly 100 KB?

The compressor aims for the selected size or slightly below it. The final size can vary by a few KB because every image compresses differently.

Will my PNG transparency be preserved?

Yes, when the output format is PNG or WebP. Converting a transparent image to JPG adds a white background because JPG does not support transparency.

Does reducing the file size reduce image quality?

Target-KB compression may lower quality or dimensions. 百分比 and dimension modes let you control the image size directly while using a high-quality export.

Are my images uploaded to DJAI?

No. The tool works locally in your browser and does not send the image to DJAI or Siamese Cat Dev.

Can this remove image backgrounds?

Yes. 去背 mode uses browser-based AI segmentation and exports a transparent PNG for product photos, profile images, and social media assets.

需要時隨時使用。

免費處理第一張圖片。

開啟圖片工具 →
DJAI ECOSYSTEM

Free tools connected to real builders.

DJAI Academy publishes practical tools for creators, founders, hospitality teams, and community builders across the Siamese Cat ecosystem.

Develop With DJAI Custom web tools, automation, apps, and AI-powered platforms. Siamese Cat Creative Club Creative workflows, social content, and visual production. Siamese Cat Cafe The community cafe and real-world brand behind the group.