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Nén JPG — miễn phí trực tuyến, không tải lên

Drop a JPG or JPEG photo into PicBrewery and download a smaller file re-encoded with MozJPEG — no account, no watermark, no upload. Everything runs in WebAssembly inside your browser.

See the JPEG section on the formats hub for codec details.

Cách nén JPG

  1. Open PicBrewery.
  2. Drag and drop your .jpg or .jpeg file (or several) onto the drop zone.
  3. PicBrewery decodes the JPEG and re-encodes JPEG, PNG, WebP and AVIF in parallel. Compare byte sizes in the results row — the JPEG column is your re-compressed JPG.
  4. Click the download icon on the JPEG cell, or use Download all as ZIP for batches.

Cách nén JPG hoạt động trong PicBrewery

PicBrewery does not resize or crop images. Compression means re-encoding the same pixels with a modern JPEG encoder (MozJPEG) at tuned quality settings, plus stripping EXIF, ICC and XMP metadata to save bytes.

For photos already saved at quality 85–90, a fresh MozJPEG pass at quality 75–80 often yields 10–30% smaller files with no visible difference. Gains are smaller if the source was already heavily optimized.

Giữ JPG vs chuyển sang WebP/AVIF

Giữ JPG khi cần tương thích tối đa (email, CMS, in ấn). Cho web, so sánh cột WebP và AVIF. Xem JPG sang WebP hoặc nén WebP.

Câu hỏi thường gặp

Nén JPG có làm giảm chất lượng không?

Re-encoding JPEG is lossy — each save can add artifacts. PicBrewery defaults to quality settings tuned for size at matching perceived quality. Use the quality slider under Advanced settings if you need a higher bitrate.

JPG sẽ nhỏ hơn bao nhiêu?

Typical camera JPEGs shrink 10–30% after MozJPEG re-encode and metadata stripping. Drop your file into PicBrewery to see exact byte counts for every output format side by side.

EXIF và GPS có được giữ không?

No. PicBrewery strips EXIF, ICC and XMP on re-encode to keep files small. Keep the original if you need metadata.

Có thể nén hàng loạt JPG không?

Yes — up to 20 files per batch, 20 MB each, with Download all as ZIP.

PicBrewery có đổi kích thước ảnh không?

No. Compression here means re-encoding only — pixel dimensions stay the same.

Nén JPG ngay

Drop JPG files into PicBrewery and download smaller JPEGs. 100% client-side.

Mở PicBrewery