Miko Bulk Image Resizer
Tidy every product photo without downloading one
Resize, compress and watermark the product and collection images already on your store, in place. You see a real before and after built from your own photos first, and every run can be undone for 30 days.
Nothing to pay to install. First 100 images included, then $0.10 per image actually resized.
Stores carrying photos far heavier than they need to be
Most catalogues are a mix. Some photos came straight off a camera, some from a supplier, some from a phone. They are different sizes, different shapes, and heavier than a shop page needs. Miko puts them all on the same footing without you touching a single file.
In place, on products and collections
No downloading, no re-uploading, no folder of files on your desktop. Miko replaces each image where it already lives, and it handles collection images too.
Five ways to resize
Cap the longest side, hit an exact frame, scale by a percentage, squeeze to a target file size, or leave the size alone and only stamp a watermark.
A preview you can trust
Miko runs a few of your own photos through the exact process the full run will use and shows both the picture and the numbers, measured on the full size result.
30 days of undo
Every run is backed up. Restore the whole run in a click, or open it and put back the one image you are not happy with. History shows what can still be undone.
Run as much or as little as you like
The whole catalogue, products you pick by hand, one collection, or everything from a tag, vendor or product type. Start with five and check them on your storefront.
Products only, nothing else
Miko asks to read and write products. It never asks for customers or orders. Backed-up originals are reachable only by your own store and are deleted when you uninstall.
Pick the mode that matches the job
The mode decides what happens to the picture. Everything else, quality, format and watermark, sits on top of it.
| Mode | What it does | Good for |
|---|---|---|
| Longest side | Caps the longer edge at the size you set and keeps the shape. It only ever makes an image smaller. | One safe rule across a mixed catalogue |
| Width and height | Targets an exact frame, with a fit style you choose below. | A tidy, even product grid |
| Scale by percentage | Scales every image between 5 and 400 percent. Above 100 percent it enlarges. | Shrinking everything by the same amount |
| Target file size | Steps the quality down until the file is under the size you name. | Slow pages caused by heavy files |
| Watermark only | Stamps your logo and leaves the pixel size exactly as it is. | Branding photos you have already sized |
Fit inside
The whole image sits inside the frame and keeps its own shape. Nothing is cut off, and images that already fit are left alone.
Crop to fill
The image fills the frame exactly, centred, and the edges that do not fit are trimmed. This one can enlarge a smaller photo, which is how every card in a grid ends up the same size.
Pad to an exact size
The whole image is kept and the gaps are filled with a background colour you choose. Nothing is cut off and every image ends up identical in size.
On top of the mode you set a quality slider, an output format (keep the original, or convert everything to JPEG, WebP or AVIF), whether to strip camera and EXIF data, and whether to skip anything that already matches. If your settings would leave an image exactly as it is, Miko skips it and moves on, and a skipped image is never charged.
Four steps, and you can stop at any of them
Nothing is written until you press the button, and the first thing the app suggests costs nothing at all.
Run Image Health
A free read of your catalogue. Oversized images, missing alt text, your largest files by name, and whether your photos are all the same shape. It changes nothing.
Choose what to cover
The whole catalogue, hand-picked products, a collection, or a tag, vendor or product type. Then pick your mode and settings.
Preview it
See the crop, the padding, the colour and the watermark on your own photos, with the before and after numbers, how many images the run covers and what it will cost. Change a field and the preview clears itself.
Run it
Runs happen on our servers, so close the tab and get on with your day. Progress waits for you on the dashboard, and History keeps the undo button for 30 days.
The rest of the image housekeeping
Once the sizes are sorted, the same app handles the jobs that usually never get done because they take too long by hand.
Image Health
Images over your size target, images with no alt text, your largest files listed by name, and whether your grid is a mix of squares, portraits and landscapes. It is a read, not a change.
Bulk alt text, never charged
Write one sentence with tokens for the product, vendor, type, image number and store name. A live table shows the result on real products as you type. By default it fills only images with no alt text, so your own wording is left alone.
Watermarks
Upload your logo once. Choose one of nine positions, a size set as a share of the image width, an opacity and a margin. The preview stamps it onto one of your own photos as you move the sliders.
Filenames, your call
Keep your existing filenames, which is the default, or rebuild them from the product title and number them in order. A filename is a search decision, so Miko does not make it for you.
Scheduled and automatic runs
Run your saved settings weekly or monthly, and optionally tidy a new product's photos shortly after it is added. Both stop at your monthly spending limit.
Variant images stay linked
When an image belongs to a variant, Miko points that variant at the resized version. The variant keeps its picture and the product page behaves exactly as before.
Every step happens in front of you
You see the real result on your own photos before a single image changes, and every original is kept so you can put it back.
You pay for the images you actually change
There is no monthly fee. You set the ceiling, and the app stops at it. Charges are in US dollars and appear on your normal Shopify bill.
- The Image Health report
- Bulk alt text, however much you run
- Previews, as many as you like
- Restores from History
- Any image that was skipped or failed
- All five resize modes
- Compression, format conversion and watermarks
- Product and collection images
- A monthly spending limit you set
- Runs pause at the limit, nothing more is charged
Compare Miko Bulk Image Resizer with the rest of the family on the pricing page.
Questions, answered
Not yet. It is in review with Shopify. The full merchant guide is already published, so you can read exactly how every screen works before the listing goes live.
No. Miko works on the images already on your store and replaces each one in place. That covers product images and collection images. Runs happen on our servers, so you can close the app and carry on.
Yes. Every original is kept for 30 days. Open History and restore the whole run, or open the run and restore a single image on its own. After 30 days the backup is removed and the run is marked as expired.
No. A skip means the image already matched your settings, so there was nothing to change. Skipped images are listed in the run so you can see which ones they were, and they are never charged.
No. Every image is written as standard sRGB with its colour profile kept, which is what browsers expect. Photos supplied in a wide-gamut or print colour space are converted properly rather than having their profile thrown away.
There is nothing to pay to install and your first 100 images are included. After that it is $0.10 USD for each image actually resized. You set a monthly spending limit and the app stops at it. Image Health, bulk alt text, previews and restores are never charged.
See exactly what it does before you install it
The merchant guide walks through every mode, every setting and every screen.
Read the Resizer guide ↗