Open a whole folder — HEIC, PNG, WebP, TIFF, GIF, PDFs and all — and convert it to JPG with one set of choices. Several files at once on several cores, one ZIP named after the folder, and a CSV report of every file.
How a big folder is handled
Each file is a row. Rows are opened and converted on separate background workers — one per spare core, up to four on a desktop and two on a phone, and fewer if the device runs short of memory — so the page stays responsive and a file that fails stops only itself. Decoded pixels are kept for a few files per worker and released as soon as each JPG is written.
The ZIP is assembled from the finished files in the order they are queued, without copying them again, and takes the folder's name. In Chrome and Edge the JPGs can instead be written straight into a folder you choose.
Step by step
- Drop a folder on the page, or press Open a folder (the folder icon in the top bar).
- Set quality, size and metadata once; they apply to every file.
- Press Download all as ZIP — or Save to a folder in Chrome and Edge.
- Press Report (CSV) for a line per file, read back from what was written.
One recipe, checked per file
Quality, background, size rule, metadata policy and DPI apply to every file; Measured quality and target size are still worked out per photo. Each card shows what was written, and the Report (CSV) button puts all of it in a spreadsheet — the figures in it are read back from the written files.