PPM 轉 QOI轉換工具
A free PPM to QOI converter for Portable Pixmap files. Browser-based pairs here usually run in this tab, with no file upload.
把你的 PPM 檔案拖曳到這裡
or 瀏覽你的裝置 · 貼上快捷鍵 Ctrl+V
Accepts .ppm, .pgm, .pbm, .pnm files. You can queue several files; each is processed one after another on your own device.
你的檔案不會離開這台裝置——沒有上傳，也沒有伺服器可以刪除它們。
- 01
新增你的 PPM 檔案
把檔案拖放到上方的方框，或點擊以瀏覽選取。檔案會直接從磁碟讀取——不會傳送到任何地方。
- 02
檢查設定
QOI is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
下載你的 QOI
按下轉換，等待該列完成即可。若轉換多個檔案，可以將它們一起打包成單一 ZIP 檔下載。
PPM
Portable Pixmap刻意設計成最簡單的影像格式——一段簡短的文字標頭，後面接著原始像素數值。在學術界與 Unix 管線中備受喜愛，正是因為任何人都能用十行程式碼解析它。
- 開發者
- Jef Poskanzer
- 發布年份
- 1988
- 副檔名
- .ppm, .pgm, .pbm, .pnm
- MIME 類型
- image/x-portable-pixmap
- 壓縮方式
- 未壓縮
- 規格文件
- 開放
QOI
Quite OK Image Format整份規格書只有一頁的無損格式，編碼與解碼速度都比 PNG 快上許多倍，只需付出一點點檔案大小的代價。在遊戲引擎與個人專案中很受歡迎。
- 開發者
- Dominic Szablewski
- 發布年份
- 2021
- 副檔名
- .qoi
- MIME 類型
- image/qoi
- 壓縮方式
- 無損
- 規格文件
- 開放
- Both PPM and QOI store every sample exactly, so nothing here is re-compressed — only the container changes.
關於 PPM 轉 QOI 的常見問題
這個 PPM 轉 QOI 轉換器是免費的嗎？
是的。在這裡把 PPM 轉換為 QOI 完全免費，不需要帳號、沒有浮水印，也沒有每日次數限制。處理在你自己的裝置上完成，因此沒有需要轉嫁給你的伺服器成本。
我的 PPM 檔案會被上傳到任何地方嗎？
For browser-based pairs, your file is read locally and converted by Squoosh in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
PPM 轉 QOI 有檔案大小限制嗎？
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
把 PPM 轉換為 QOI 會損失品質嗎？
No. QOI stores its data losslessly, so everything in your PPM file is preserved exactly.
可以一次把多個 PPM 檔案轉換為 QOI 嗎？
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
PPM 轉 QOI 能在手機、Mac 或 Chromebook 上使用嗎？
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
將其他格式轉換為 QOI
這裡有 16 種格式可以轉換成 QOI。
將 PPM 轉換為其他格式
一個 PPM 檔案可以轉換成以下任何一種格式。