Wix Image Size: Limits, Best Dimensions and Format

Wix lets you upload images up to 50 MB each and GIFs up to 15 MB. Its own performance guide separately says to compress any file larger than 25 MB before uploading. Every figure below comes from a Wix help page opened on 11 October 2026.

When an upload fails for size, Wix shows “This file is too big. Upload a smaller file” with the cap filled in; Wix’s upload troubleshooting page does not list a number there. Check one compressed file before you upload a hundred of them.

Upload at least 2560 × 1440 pixels for full-width images, and use the feature-specific sizes for blog covers and social previews. Wix then optimizes files to the dimensions they display at, per its Pro Gallery article, so a very large original adds upload weight without adding sharpness.

Smol’s image defaults resize to fit inside 2000 × 2000 pixels, which is below Wix’s 2560 recommendation, so change that setting before you run a batch for Wix. Agencies building many sites can read the web agency workflow, and Squarespace owners the Squarespace image size guide.

Special cases

• Background images: Wix asks for at least 3000 × 3000 px, so keep the long edge at 3000 or above.
• Blog covers: 940 × 705 for the side-by-side and editorial layouts, 940 × 940 for magazine.
• Social share: 1200 × 630, and under 300 KB if WhatsApp previews matter to you.

What is the best image format for Wix?

Upload JPG for photos and PNG for graphics that need sharp edges or transparency. Wix converts uploads to AVIF on the live site, which its own guide calls approximately 50% smaller than WebP, so you do not need to upload AVIF yourself.

Wix accepts many inputs, including HEIC, TIFF, WEBP, AVIF and RAW, but a JPG from Smol is the predictable choice. For logos and decorative shapes Wix recommends vector art, and its SVG cap is 250 KB. For anything animated it recommends video, not GIFs. Our GIF to MP4 guide covers that swap, and the HEIC to JPG guide covers iPhone photos.

On a Mac, use Compress with output JPG, not Convert, because quality settings belong to Compress. For the format trade-offs measured on the same test images, see the image compressor benchmark. The compress images for web page gives the short version. Wix says its optimization cannot be turned off.

Blur on Wix usually comes from a source smaller than 2560 × 1440, a screenshot, an image scaled down by the browser, or gallery quality set too low. Wix notes that browsers apply their own downscaling, which can smooth colors or blur an image compared with the original file.

• Start from the original, not a screenshot or a file already compressed twice.
• Upload at least 2560 × 1440, as the Pro Gallery article advises.
• In a Pro Gallery, do not push image quality above 90; Wix says it can hurt site performance.
• Do not over-compress first. Compressing a photo hard in Smol and then letting Wix re-encode it to AVIF can add to the loss. Use quality 80 to 85 as a starting point, not 40.

That last point is the main trade-off of this page: Wix re-encodes whatever you upload, so the file you send should be moderately compressed, not squeezed. The quality numbers here are starting points we chose, not Wix rules; judge one output at full size before you run the folder.

Wix Video accepts up to 15 GB per file at 480 × 470 to 1920 × 1080 pixels, while the Single Video Player takes your own video up to 1 GB. Wix’s performance guide also tells you to compress videos before uploading.

Wix’s 1920 × 1080 ceiling matters for 4K phone clips. In Smol, compress to MP4 and reduce the resolution to 1080p; the 4K compression guide and reduce video file size post show the method. Smol sets quality and resolution, not output bytes, so check the finished size against your cap. Wix advises against video backgrounds because they can slow the first page load.

For photos use Compress, output JPG, quality 80 to 85, and a maximum dimension of 2560 or more. The numbers are starting points we chose, not Wix rules, so open one result at full size before running a batch. The benchmark figure below used tiny test images; your camera files will differ.

In the benchmark, Smol made 24 high-quality JPEG test photos 69.3% smaller at quality 75 (24 small 768 × 512 film photographs, JPEG to JPEG). See the benchmark for the method.

Compress the whole folder once, then upload the copies to the Wix Media Manager.

1. 1

   Gather the images

   Keep the originals where they are. By default Smol writes a copy with a _compressed suffix and never overwrites.

2. 2

   Drag the folder into Smol

   Mixed batches work: photos, a PDF and a clip can go in together.

3. 3

   Set JPG, quality 80 to 85, and a max dimension of 2560 or higher

   Raise the 2000 px default. Keep fit mode so nothing is cropped.

4. 4

   Run it and read the sizes

   Smol shows each output. Find the largest. If it is under 25 MB, it meets Wix’s own advice.

5. 5

   Upload to the Media Manager

   Check the picture at full size on your live page after publishing, on desktop and phone.

Free options work for a few files. Preview and Photos export at a size and quality you choose, and online compressors cover small jobs. A Mac app earns its place on folders.

The sips command guide and the methods comparison cover the free routes in detail.

Smol is a Mac app for local files, so it does not fit every Wix job.

• You are on Windows or a Chromebook: Smol is macOS only.
• You need responsive sets: one run makes one size, so several widths of one photo need separate runs and renaming.
• You need pixel-identical output: Smol has no lossless mode; ImageOptim is the answer there.
• You only upload a few images a year: Preview does the job.
• Your files are already small web images: Smol keeps the original if compressing would enlarge it, so there is little to gain.