Convert Image Format on Download: JPG, PNG, WebP

Get the right format the first time

A URL list almost never gives you a single, consistent file format. You scrape a page and end up with a mix of PNGs, JPEGs, and WebP, when your site or pipeline really wants just one. Converting them afterward in a separate app is the usual chore. Bulk Image Downloader From URL List handles it inline: the convert option changes each image’s format as it downloads, right in the browser, so the files that land are already in the format you need.

Convert is set per download task on the options page, alongside the other processing options.

What convert does

Convert skips resizing entirely and focuses on one job: changing the file format. You choose the target from:

• JPG — the safe, universal choice for photos and broad compatibility.
• PNG — when you need lossless output or transparency preserved.
• WebP — smaller files at comparable quality, ideal for modern web delivery.

A quality slider comes with the conversion, so you can tune the compression on the output rather than accepting a fixed setting. Lean toward higher quality for hero images, lower for thumbnails and bulk assets where size wins.

Convert and resize do not run together

This is the one rule worth internalizing: on a single task, resize and convert are mutually exclusive. You pick one per task. If you only need a format change — say, a pile of PNGs into WebP at their original dimensions — convert is exactly the tool. If you need both a format change and a size change, you have two clean options: run them as two separate tasks, or resize first and then convert in a second pass. The extension keeps the two operations distinct on purpose, which keeps the output predictable.

Where convert fits in the download pipeline

The processing sequence is the same regardless of which option you chose: the file downloads, then resize or convert runs, then EXIF is stripped if enabled, then a watermark is applied if set, and finally the file saves to your folder. Because the conversion happens before the file is written, you never end up with the original format sitting in your Downloads folder — only the converted result.

A common use case

The classic reason to reach for convert is a WebP migration. You have a backlog of JPGs and PNGs and a site that wants WebP everywhere. Paste your URL list, set convert to WebP, dial in a sensible quality, and run the task. Every file arrives ready to drop straight into your media library, with no manual conversion step and no leftover originals to clean up afterward.

Batch testing before you commit

Run a single-URL Try PRO task first when you are unsure which quality setting fits. Open three outputs side by side — original, JPG at 85, WebP at 80 — and pick the smallest file that still looks acceptable at full zoom. Paste the winning settings into your main list task so every image in the batch matches that benchmark.