Batch Image Optimizer

Shrink 100s of Images at Once

Drop a zip of images, get them all optimised in one batch.

Compress an entire folder in one shot. Drop 50, 100, or 500 images; we run each through the best codec for its content (lossy for photos, lossless for graphics) and return a zip with everything optimised. Typical savings: 40–70% file size with no visible quality loss.

Why batch-optimise instead of one-by-one

If you're shipping a website with hero images, an e-commerce catalogue, an email campaign with 30 product shots, or a slide deck of screenshots — running each image through a single-file tool is busywork. Batch optimisation handles them all in parallel and produces a single download.

Per-file tools we have for the granular case: Compress JPG, Compress PNG, Compress WebP. Use those when you want to dial quality per file. Use this when you want one knob across many.

How the batch picks settings

Detects image type per file. JPG, PNG, WebP, AVIF, HEIC, GIF.
Picks codec per file. Photos stay JPG (or convert to WebP/AVIF if you opt in); graphics stay PNG (or convert to lossless WebP).
Applies quality target. Default 85 for photos, lossless for graphics; adjust globally if needed.
Reports per-file savings so you can spot any outliers.

Format conversion option

Optional: convert all output to WebP or AVIF for maximum web performance. WebP is universally supported in modern browsers (~96%); AVIF is smaller still but with slightly less coverage (~92%). Both produce 25–50% smaller files than equivalent JPG at matching visual quality.

Limits

Free: 30 images per batch, 5 batches per day. Free signed-in: 100 per batch. Premium: 500 per batch, unlimited daily. For ongoing automated optimisation (CI pipeline, CMS hook), contact us about API access.

Frequently asked questions

What's the max number of files?

30 anonymous, 100 free signed-in, 500 premium. For larger needs, contact us.

Can I keep file names?

Yes — output zip mirrors the original names with original extensions (or new ones if you converted format).

Does it preserve EXIF?

Photos: by default yes. Toggle off to strip EXIF for privacy (use our <a href='/tools/metadata-accessibility/exif-stripper/'>EXIF Stripper</a> separately for explicit stripping).

Will quality drop?

Default settings are visually lossless. Drop the quality slider for smaller files at cost of some artefacts.

What about already-optimised files?

We re-encode at our settings; if your originals were already smaller, we report 'no improvement' and keep the originals.

Maximum file size per image?

25 MB per file.

Can I convert formats in batch?

Yes — convert all to WebP, AVIF, JPG, or PNG in a single pass.

Are uploads private?

Yes — deleted within 24 hours, never used for training.

About Batch Image Optimizer

Batch Image Optimizer is a free online tool from Wallpapers.com that runs entirely in your browser — no install, no watermark, no email sign-up for the first try. Drop a zip of images, get them all optimised in one batch.

How to use Batch Image Optimizer

Drop your image into the upload area (single or batch — toggle Bulk at the top).
Pick any settings the tool exposes (size, format, quality).
Click Run. The result downloads automatically — no manual save step.

When to use it

Common use cases include: prepping images for web upload, e-commerce listings, social media platforms with format constraints, and converting files from one device or app to another.

Free vs Premium

Every visitor gets a free trial run; signed-in free users get a higher daily quota. Subscribe to Premium for unlimited runs, bulk processing up to 200 images per job, priority queue, and ad-free browsing.