ShortPixel vs Imagify: Credits, Compression & WebP/AVIF (2026)

ShortPixel Image Optimizer and Imagify both process WordPress images in the cloud and return smaller files, but their pricing and control models are different. ShortPixel measures work with image credits or an unlimited plan and exposes several compression modes. Imagify measures quota by original image data and emphasizes a simpler Smart Compression workflow.

Compare	ShortPixel Image OptimizerFree 100 credits/month; Unlimited $9.99/month; one-time credit packages available Remove	ImagifyFree 20MB/month; Growth $4.99/month billed yearly; Infinite $9.99/month billed yearly Remove
Pricing model	Freemium	Freemium
Starting price	Free 100 credits/month; Unlimited $9.99/month; one-time credit packages available	Free 20MB/month; Growth $4.99/month billed yearly; Infinite $9.99/month billed yearly
Free version	Yes	Yes
Sites included	Credits/account can be used across multiple sites	Unlimited websites on current plans
Lifetime option	No	No
Refund policy	30-day money-back guarantee	no
Setup level	Intermediate	Beginner-friendly
WordPress.org rating	4.5/5 (819)	4.3/5 (1,655)
Active installs	300K+	1M+
Best for	Image-heavy WordPress sites that want cloud compression, WebP/AVIF generation, PDF optimization, and a choice between recurring unlimited usage or non-expiring one-time credits.	Sites wanting straightforward cloud-based compression, resizing, backups, and WebP/AVIF generation across unlimited websites.
Not ideal for	Sites that want a traffic-based adaptive image CDN without replacing local media files or sites that prefer all optimization to happen locally.	Sites that want an included image CDN, fully local processing, or non-expiring one-time optimization credits.
Tested version	6.5.6	2.3.4
Last reviewed	2026-09-24	2026-09-24
Features
Lossless compression	Yes	Yes
Lossy / smart compression	Yes	Yes
WebP generation / delivery	Yes	Yes
AVIF generation / delivery	Yes	Yes
Bulk optimization	Yes	Yes
Optimize new uploads automatically	Yes	Yes
Automatic image resizing	Yes	Yes
Restore original images	Yes	Yes
Local / server-side processing	No	No
Cloud optimization service	Yes	Yes
Image CDN delivery	Limited	No
Device / viewport-aware delivery	No	No
Media offloading / cloud storage	No	No
PDF optimization	Yes	No
EXIF / metadata controls	Yes	Limited
Unlimited-site usage	Yes	Yes

Compression philosophy

ShortPixel lets administrators choose Lossy, Glossy or Lossless compression. That is useful when a photography portfolio, product catalog and ordinary blog images require different quality policies.

Imagify reduces that decision surface with Smart Compression, plus a Lossless option. This can be easier to standardize across client sites because editors are less likely to choose inconsistent compression modes.

Credits vs megabytes

ShortPixel Free includes 100 credits per month. A credit is generally consumed per optimized image size, and creating WebP or AVIF can consume additional credits outside Unlimited plans. One original WordPress upload may generate many thumbnails, so credit usage can multiply quickly.

Imagify Free includes 20MB/month and Growth includes 500MB/month. Its quota is based on the original file size rather than the number of WordPress thumbnails. Large high-resolution uploads therefore matter more than thumbnail count.

One-time optimization vs recurring volume

ShortPixel’s non-expiring one-time credits are useful when the main job is a large historical library and future upload volume is low. The Unlimited plan suits ongoing heavy processing.

Imagify’s monthly quota naturally fits sites with steady upload volume, while Infinite removes the quota. Model the next 12 months of uploads rather than choosing from the current library alone.

PDFs and non-image assets

ShortPixel can optimize PDF documents in addition to normal image formats. Imagify focuses on images.

For documentation-heavy sites, including PDF compression in the same optimization workflow can be a meaningful operational advantage. For sites with no large PDFs, that capability may have no value.

Backups, restore and destructive changes

Both can preserve originals and support restoration. Keep backups enabled during the first bulk run until the team has reviewed representative images at real display sizes.

After quality settings are proven, decide whether retaining every original indefinitely is worth the storage cost. The correct answer differs for stock photos, screenshots and irreplaceable original photography.

Which workflow fits?

Consider ShortPixel when flexible compression modes, PDF optimization and non-expiring credits fit the workload. Consider Imagify when a simpler Smart Compression workflow and MB-based quota across unlimited sites are easier to operate.

For agencies, create one optimization policy per content type instead of letting each client choose arbitrary quality settings. Consistency makes visual QA and support easier.

Use a quota forecast before a large import

ShortPixel credits and Imagify megabytes react differently to WordPress imports. A feed that imports 5,000 moderate JPEGs with six generated thumbnails can produce a very different ShortPixel credit bill than an Imagify data quota, while a few enormous source photos can consume Imagify MB quickly.

Run a sample import of 50–100 representative images, record generated sizes and quota usage, then extrapolate. This is much more reliable than dividing plan limits by the number of original media items.

Separate archival originals from web delivery assets

Both products can keep originals, but long-term storage policy should be intentional. Irreplaceable photography should live in an external archive or object storage even if the optimizer keeps a backup copy. Ordinary stock graphics may not need the same retention policy.

The optimizer’s backup is primarily a rollback mechanism, not a digital-asset-management system. Defining that boundary prevents storage bloat while protecting media that cannot be recreated.

Do not compare only first-pass compression savings

ShortPixel and Imagify can produce different savings depending on source format, dimensions and prior compression. One service may win on a particular JPEG and lose on a transparent PNG. Test a representative batch rather than selecting from a single benchmark image.

Also compare the operational result: whether next-gen files are created correctly, originals can be restored, new uploads are processed automatically and the quota model is understandable to the team. Those workflow factors usually matter longer than a few percentage points of compression.

Agency accounts need quota ownership

Both services can be used across multiple sites, but agencies still need a clear owner for quota consumption. Assign sub-accounts or internal labels where available, record which clients generate the most processing, and avoid letting one import consume resources expected by other sites.

That governance matters most on shared plans. A predictable optimization budget is easier to maintain when usage can be traced back to a client or project rather than appearing as one unexplained account total.

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