How many images can I check and batch resize at once?

You can upload up to 20 images simultaneously. The tool inspects each file's exact pixel dimensions, aspect ratio, file size, and detects whether it matches standard marketing specs.

Are my ad creative files uploaded to a remote server?

No. All inspection, canvas resizing, and ZIP packaging happen 100% locally in your web browser. Your client assets, confidential creatives, and unreleased designs never leave your device.

What aspect ratios and presets can I bulk convert to?

You can batch resize to Google Ads Landscape (1200x628), Square 1:1 (1200x1200), Portrait 4:5 (960x1200), Google Play Icon (512x512 PNG), Play Feature Graphic (1024x500), Vertical Story (1080x1920), and Web Open Graph (1200x630).

What is the difference between 'Fit entire image' and 'Fill & Crop' in bulk mode?

'Fit entire image (Contain)' preserves 100% of your source visual by adding neutral letterboxing pads to match the target ratio without distortion. 'Fill canvas (Cover)' centers and crops edges so the output completely fills the target dimensions without empty borders.

Tools/Bulk Creative Asset Checker

TOOL 8 — MULTI-ASSET INSPECTION & BATCH RESIZERUp to 20 files · ZIP download

Audit dozens of ad assets in seconds, batch resize & export as ZIP.

Drag and drop your creative campaigns. Instantly check dimensions, aspect ratios, and file weights against Google Ads, Meta, and App Store standards. Batch resize with clean fit modes and download all processed files in a single archive.

Parallel multi-file dimension inspection·100% client-side privacy (no server uploads)·One-click ZIP packaging with JSZip

BATCH ASSET ENGINE READY

Drop up to 20 creative images below for instant analysis

Single Resizer

Drop multiple marketing creatives here

or on your device (up to 20 images)

PNG, JPG, WebP Batch Inspect Dimensions & Ratios 100% In-Browser

WORKFLOW EFFICIENCY

Why audit creative assets in batches
before launching campaigns?

Media buyers, performance marketers, and growth agencies manage hundreds of creative variants each week. A single mismatched asset ratio can cause an entire ad group or campaign upload to fail.

Platform / Network	Core Ratios	Primary Dimensions	Max File Size
Google Responsive Display	1.91:1 Landscape & 1:1 Square	1200 × 628 px & 1200 × 1200 px	5,120 KB (5 MB)
Google Performance Max	1.91:1, 1:1, and 4:5 Portrait	1200×628, 1200×1200, 960×1200 px	5,120 KB
Meta Ads (Feed & Reels)	1:1 Square & 9:16 Vertical	1080 × 1080 px & 1080 × 1920 px	30 MB
Google Play Store Listing	1:1 Icon & 1024:500 Feature Graphic	512 × 512 px (PNG) & 1024 × 500 px (JPEG)	1,024 KB / 15 MB
Web & Open Graph (OG)	1.91:1 Social Share Card	1200 × 630 px	8 MB

Drop multiple assets

Drag up to 20 images directly onto the dropzone. Calkora instantly reads each image's dimensions, aspect ratio, and compression weight without uploading to any server.

Inspect spec compliance

Green badges indicate exact standard ad dimensions (e.g. 1.91:1 or 1:1). Amber badges identify custom or non-standard ratios that need resizing before submission.

Batch resize & ZIP

Select your target dimension preset, choose between 'Fit entire image' or 'Fill canvas', and convert all assets concurrently into a neat ZIP archive.

FREQUENTLY ASKED QUESTIONS

Everything you need to know about bulk asset processing

How many files can I inspect simultaneously?+

You can upload up to 20 images per batch. Our multithreaded browser canvas engine processes them concurrently so you get instant results without slowdown.

Is there any file upload or privacy risk with confidential creatives?+

Zero risk. All image decoding, aspect ratio validation, canvas re-rendering, and ZIP file generation occur purely within your browser session via JavaScript and Web APIs. No file bytes are sent to our servers.

Can I convert mixed image formats (PNG, WebP, JPEG)?+

Yes. You can upload any standard web graphic formats including JPEG, PNG, and WebP. When batch resizing, you can convert them all to high-performance JPEG or crisp PNG.

Which fitting behavior should I choose for ad platforms?+

We recommend 'Fit entire image (Contain)' if your assets contain logos, typography, or product packages that cannot be cropped. If your visuals are background photography or lifestyle shots, choose 'Fill canvas (Cover)' for borderless results.