Walk a local folder, compress every image to JPEG 82%, export a ZIP that mirrors the source tree

Folder Batch Compress (File System Access API)

Shrink a whole photo folder in one click. The ZIP preserves your folder hierarchy, so it drops straight into any upload target.

Resposta rápida

Pick a folder; every image in it compresses to JPEG 82% and exports as a ZIP that mirrors your folder tree. Fully local via File System Access API.

Fatos-chave

Output: JPEG (Q82)
Max files: 200
Max file size: 40 MB / file
ZIP layout: Mirrors source tree
Browser support: Chrome / Edge (FS API) · others fall back
Processing: Runs in your browser

Útil para

Shrink a whole photo archive
Preserve directory structure across a batch compress
Process a camera SD card dump in one go

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Como usar

Click "Pick folder" to choose a local folder (or drag-drop on unsupported browsers)
Review the file count and total size
Click "Start" — progress + count stream live
Click "Download ZIP" to grab the compressed tree

Perguntas frequentes

Which browsers support the folder picker?: File System Access API is fully supported on Chrome / Edge / Opera. Safari and Firefox fall back to drag-drop (folder structure is flattened to filenames).
Does it overwrite the originals?: Never. Originals stay untouched; the compressed set ships as a separate ZIP. Safe to run on important folders.
Only JPEG output?: Phase 2 ships JPEG Q82 only. Format + quality selection (e.g. WebP output, lossless, resize options) lands in Phase 3.
What happens if a file fails?: Per-file failures are tolerated. The failing filenames + reasons surface in the UI and the ZIP contains the successful outputs — so you always have something to download.

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Perguntas frequentes

Which browsers support the folder picker?

File System Access API is fully supported on Chrome / Edge / Opera. Safari and Firefox fall back to drag-drop (folder structure is flattened to filenames).

Does it overwrite the originals?

Never. Originals stay untouched; the compressed set ships as a separate ZIP. Safe to run on important folders.

Only JPEG output?

Phase 2 ships JPEG Q82 only. Format + quality selection (e.g. WebP output, lossless, resize options) lands in Phase 3.

What happens if a file fails?

Per-file failures are tolerated. The failing filenames + reasons surface in the UI and the ZIP contains the successful outputs — so you always have something to download.