Add your images
Select or drop up to 30 JPG, PNG, WebP, HEIC/HEIF, or AVIF photos at once.
PRIVATE, BROWSER-BASED IMAGE WORKFLOW
Free Batch Image Compressor & WebP Converter
Compress, rename, and generate multilingual alt text in one workflow.
- Add & customize
- Process
- Download
Output format
Keep every image at its original dimensions.
Add your imagesJPG, PNG, WebP, HEIC, HEIF, or AVIFDrag and drop them anywhere in this areaChoose imagesStill images · up to 30 files · 25 MB per file · 150 MB per batch · 50 MP per imageImages stay on this device during compression.
- No upload during compression
- Up to 30 images per batch
- WebP, JPG, or PNG output
- Proportional batch resize
- Individual, ZIP, or Excel download
- Optional bilingual AI metadata
HOW IT WORKS
Optimize a full image set in three steps
Compress, resize, rename, and prepare bilingual alt text without moving between separate tools.
Set output and context
Choose WebP, JPG, or PNG, adjust quality and size, then add optional publishing context.
Generate, review, and download
Create editable filenames and bilingual alt text, then download the images with an Excel metadata file.
CLEAR OUTPUT, SIMPLE CONTROLS
Built for repeatable publishing work
PicFeather is designed around a single batch workflow for compression, filenames, and image descriptions.
Compression and resize
Choose WebP or JPG quality, optimize PNG without quality loss, and resize a batch proportionally.
Consistent downloads
Filenames use lowercase kebab case, and duplicate names receive a clear numeric suffix.
Editable AI metadata
Create and revise kebab-case filenames plus English and Traditional Chinese alt text, then export the final mapping to Excel.
PRIVACY BY DEFAULT
Compression stays on your device
Compression and conversion stay inside your browser. AI runs only after you click Generate and sends a reduced preview with the optional context you entered; PicFeather does not store those previews or results. Read the full privacy policy.
COMMON QUESTIONS
PicFeather FAQ
Are my images uploaded to a server?
No. The current compressor decodes and converts images inside your browser. Closing or refreshing the page clears the working queue.
Which image formats can I use?
Accepts still JPG, PNG, WebP, HEIC/HEIF, and AVIF images and exports WebP, JPG, or PNG. HEIC/HEIF uses the primary photo; Live Photo motion is not included. Animations and SVG are not supported yet. Limits: 30 files, 25 MB per file, 150 MB per batch, 50 megapixels and 16,383 pixels per edge. HDR and wide-gamut colors may change when converted to standard-color output.
Can I control image quality?
Yes. WebP and JPG output use a quality value from 35 to 95, with Small, Balanced, and High presets. PNG output uses lossless compression and preserves full image quality.
Which output format should I choose?
WebP is a strong default for websites, JPG is widely compatible for photographs, and PNG is useful when you need lossless output or transparency. Transparent areas are filled with white when exporting JPG.
Can I resize a full batch of images?
Yes. Turn on Resize, choose a common maximum width or enter a custom width, and PicFeather will keep each image proportional without enlarging smaller files.
Can PicFeather create filenames and alt text?
Yes. PicFeather can analyze a reduced preview to suggest an English kebab-case filename plus editable English and Traditional Chinese alt text. Article context, brand names, and preferred terminology are optional, and primary keywords can target filenames, alt text, or both when relevant.
Can I export all alt text to Excel?
Yes. After processing and generating alt text, you can download an Excel file that matches every final image filename with its edited English and Traditional Chinese alt text. Batch ZIP downloads can include the same spreadsheet automatically.
What is sent when I use the AI feature?
Compression remains local. Only after you click Generate does PicFeather create and send a reduced image preview, up to 1024 pixels on its longest side, with any optional context you entered. PicFeather does not add storage for those previews or generated results.