Choose the output your destination accepts
If you have several iPhone photos for an upload form or a folder of graphics for a presentation, converting one file after another takes extra clicks. FluidConvert's Multiple files mode converts up to 20 images of the same source format and packages the successful results in a ZIP.
Choose the converter that matches your files and destination:
Each batch uses one source format and one output format. Separate a mixed folder into matching groups first. Animated sources produce a still image, not a set of animation frames.
Convert the batch
- Open the matching converter and choose Multiple files above the converter box.
- Click Choose images and select files from your device, or drag the files into the box. Select individual files; dropping a folder is not supported.
- Review the filenames and remove anything you do not want to convert. Choosing different images replaces the current selection.
- For JPG output, adjust JPG quality if needed. The starting value is 92%. PNG output has no JPG quality setting.
- Click Convert images. The page processes images one at a time and shows each result. Keep the tab open until it finishes.
- Open an individual download to check the result. Then choose Prepare ZIP, followed by Download ZIP, to save all successful conversions together.
For a first test, each converter has an original sample file beneath the converter. The WebP and SVG samples include transparent corners, making it easy to check the difference between PNG transparency and JPG's white background.
Understand the limits before selecting files
You can select up to 20 images, with 20 MB per source file, 100 MB total input, and 25 megapixels per image. A 6000 × 4000 image has 24 megapixels; an 8000 × 6000 image has 48 megapixels and exceeds the batch limit. The combined converted output is limited to 200 MB.
These limits help keep processing manageable, but available memory varies by device. If a phone or browser struggles, use fewer or smaller images. The converter does not automatically resize a batch. One file mode is also available with its own displayed limits.
Balance JPG size and quality
JPG is lossy: re-encoding can change edges, text, and fine detail. A lower quality value often makes smaller files, but the exact size depends on the image and the browser. Setting 70% does not mean a 70% reduction in file size.
If a form requires a file under a specific size, check each downloaded JPG against that requirement. Convert the batch again with a lower setting if necessary, or use the image compressor for a separate size-reduction step. Keep your original images rather than repeatedly converting an already compressed JPG.
PNG preserves the decoded pixels without JPG compression and can be larger than the WebP input. Choose it when transparency or a PNG-only destination matters, not because you expect a smaller file.
If one image fails
A failed image gets its own error message. Other images continue converting, and their downloads stay available. The ZIP contains only successful results; compare the converted count with the number you selected before clearing the page.
Check that the failed file really uses the format shown in its extension. Renaming a file does not convert it. For SVG, embed linked images and outline essential text in your design app so the file does not depend on external resources. For an oversized or unreadable source, try a smaller export or One file mode.
Stop after current image finishes the image already being processed and leaves the remaining files unconverted. You can download completed results or run the selected images again. Starting another conversion, clearing the list, switching modes, or leaving the page discards the current in-page results, so save your downloads first.
Where processing happens
Multiple files mode processes the images on your device. It does not upload the images to a conversion server. A file that cannot be converted locally is reported as failed. One file mode works differently: it first tries local conversion and can fall back to server processing.
Batch conversion creates new images from decoded pixels and does not copy the original metadata. Do not rely on it to preserve capture dates, GPS, HDR, depth data, editable vectors, or Live Photo motion. Keep the original files for your archive.
Open the ZIP or make a PDF instead
The ZIP is a package of separate images. Extract it with your device's archive app before selecting the images for a form or document. Duplicate filenames receive a numbered suffix inside the ZIP so one result does not overwrite another.
A ZIP does not turn the images into document pages, and it does not promise smaller images. If your destination wants a single document, use image to PDF to combine JPG, PNG, or WebP pictures in page order. Convert HEIC files to JPG first, then add the downloaded JPGs to that tool.