Resize images online - any size, any channel
Scale JPG, PNG and WEBP to exact dimensions with aspect ratio lock, social presets and bulk support. Perfect for ecommerce, ads and web - in one click.
- Exact pixel dimensions
- Channel presets built-in
- Bulk ready
- No signup required
Works with JPG, PNG, WEBP, HEIC · Up to 25 MB per image
SourcePresets
Dimensions
Fit mode
Trusted by teams resizing at scale
From social campaigns to marketplace catalogs - Picnie resize delivers exact dimensions every time.
“We resize every SKU to Amazon, Shopify and Etsy specs in one batch. What used to take a week now runs overnight.”
“Marketing picks a preset - Instagram, LinkedIn, email - and exports a full campaign in minutes. No more Canva resize roulette.”
“The resize API sits in our upload flow. Every user image lands at exactly 1200×1200 before it hits storage.”
Powering resize at
Presets for every channel
One-click resize for social, ads, email, marketplaces and web - each preset crops to the exact pixel dimensions your channel requires.
Sample images shown. Picnie processes your files privately and never trains on them.
Why use Picnie image resize
Built for ecommerce, marketing, developers and anyone who needs pixel-perfect output at any scale.
Exact dimensions
Set width and height in pixels - no rounding surprises or blurry upscales.
Channel presets
Instagram, Facebook, LinkedIn, Amazon, email and more - one click.
Aspect ratio lock
Keep proportions while scaling - or stretch with fill mode when you need it.
Bulk processing
Resize thousands of images in a single run with folder structure preserved.
DPR & retina
Export @2× and @3× variants for sharp displays without manual math.
Fast & private
Most images finish in under two seconds. Files auto-deleted after one hour.
How to resize images online
Four steps. Under five seconds. Zero setup.
Upload image
JPG, PNG, WEBP or HEIC up to 25 MB.
Set dimensions
Custom pixels or pick a channel preset.
Choose fit mode
Cover, contain or fill - with aspect lock.
Download
Single file or batch ZIP export.
Supported formats
Popular presets
- Instagram · 1080×1080
- Facebook · 1200×630
- Amazon · 2000×2000
Private by default
Files are processed in-region and auto-deleted after one hour. We never train models on customer uploads.
Built for every workflow
From a single banner to a million-SKU catalog, Picnie resize fits any team.
Ecommerce
Marketplace specs
Marketing
Social & ad creatives
Developers
Resize via REST API
Photographers
Web galleries & proofs
Mobile apps
Asset variants @2× @3×
Catalogs
Bulk SKU resize
Do more after resizing
Chain Picnie tools into a full visual workflow - no exports between steps.
Automate image resizing
Resize images programmatically with Picnie APIs. Built for production with webhooks, batch processing and predictable latency.
- Batch processing
- REST API
- Sub-2s per image
- Webhooks & retries
curl -X POST https://picnie.com/api/v1/resize-image \
-H "Authorization: Bearer $PICNIE_KEY" \
-H "Content-Type: application/json" \
-d '{
"image_url": "https://cdn.acme.com/product.jpg",
"width": 1200,
"height": 1200,
"fit": "cover",
"lock_aspect": true,
"webhook": "https://acme.com/hooks/picnie"
}'
// Response
{
"id": "rsz_8f3a…",
"status": "succeeded",
"output_url": "https://cdn.picnie.com/out/8f3a.jpg",
"width": 1200,
"height": 1200,
"duration_ms": 980
}Frequently asked questions
Resize any image
in seconds.
Upload once. Download at exact dimensions. No signup required.