THE PIKOZIP IMAGE TOOLKIT

Create responsive images for your website.

Generate responsive image sizes with WebP or AVIF and PNG or JPEG fallbacks. Download images, a manifest and picture markup together in one organized ZIP.

On-device processing

Drop your images here

Your image format stays the same. Drag and drop, or choose images below.

Up to 30 images · 10 MB per image

PNGJPEGWebPAVIF

Output settingsOriginal format · Smart compression · Original dimensions

Customize

Fine-tune your files

Smart compression keeps your file format and searches for a smaller checked result.

Start with a useful profile

Choose a starting point, then adjust the details below.

Settings saved on this device

Save current settings

Saved profiles 0/10

Format conversion profiles are available in the Convert tab. Profiles affect new images. Use “Apply to all images” below to update your current batch. Saved profiles contain settings only; your images are never saved here.

Optimization approach

Same format. Adaptive settings. Smart compression tries candidate settings and checks detail before choosing a smaller result. Review fine text, gradients and transparent edges. Choose Manual and Lossless PNG when decoded-pixel preservation matters. Dimensions stay in place unless you choose a maximum width.

Output format

The original image format is kept. Choose the Convert tab to change formats.

Lossy image qualityAuto-selected

Smaller fileMore detail

Candidate settings are chosen with detail checks. Select Manual to set quality yourself.

Maximum width

Keeps proportions. Never enlarges.

PNG compression

Searches for a smaller PNG with color and detail checks. Review gradients and edges.

Target file size OPTIONAL

Smart processing searches within its detail guard. A size goal is not guaranteed.

Settings apply to new images. Apply them to update the current batch.

FROM IMAGE TO PUBLISHING

One source. Every size you need.

Create responsive image files from your originals, with a working preview and a file manifest. Nothing connects to or changes your website.

Responsive sizesTransparency-aware fallbackNo enlargement

Choose images above to get started. Images that finish processing will be available here.

Maximum widths

480px960px1600px2400px

Smaller originals stay small. Duplicate widths are exported only once.

Modern format

JPEG fallback for opaque images. PNG fallback for transparency.

Where will these images appear?

Sets the starting layout in the included responsive examples.

Lossy quality setting85

This is an encoder setting. Review the files before publishing.

0 source images readyUp to 30 sources · 10 MB each · 96 MiB generated-output limit

Loading the pack builder…

Website Ready Pack

One source, a complete delivery

Choose your original images above. A same-format optimized preview prepares the batch. Once it is ready, use the pack builder to create the widths and formats your website needs. Every variant is encoded from the original source.

Download a ZIP containing image variants, working responsive HTML examples, a README and an exact file manifest. Add image descriptions, choose a starting layout, and review the pack before publishing.

Creating several sizes takes longer than a single export. The pack never enlarges an image; requested widths that collapse to the same source width are included only once.

The pack does not connect to your website. Upload its files and adapt the included examples to your real layout. Generated image output is limited to 96 MiB per pack.

A SIMPLE WORKFLOW

Get started with Website Ready Pack.

Bring your images.

Choose a file, a batch, or a folder. Your original files remain untouched.

Find your balance.

Set format, quality, width, and an optional target size. Compare your result.

Take the lighter route.

Download one image or the whole batch in a ZIP, with folder paths preserved.

THE DETAILS THAT MATTER

Know your result.

Are my images uploaded?

No image bytes are uploaded. Your browser fetches the image codecs, then processes your selected files locally.

Will the output always be smaller?

Savings vary. A same-format, same-dimension original is retained when it is smaller. Explicit conversions may increase file size, which the result clearly shows.

Can I keep working from the original?

Yes. PikoZip does not overwrite the source file on your device. Keep your original master and download the output as a separate file.

YOUR NEXT STEP

Keep the workflow moving.

YOUR WORKFLOW

One image, six website files: a responsive image case study

A real PikoZip Website Ready Pack run: three widths, WebP and JPEG fallbacks, no enlargement and a 904.2 KB ZIP from one source image.

Explore

LEARN SOMETHING USEFUL

Compression benchmarks

Compare four PNG modes and WebP/AVIF exports with original fixtures, exact file bytes, decoded-pixel checks and a transparent reproduction method.

Explore YOUR WORKFLOW

WordPress workflow

Compress and resize images before adding them to WordPress. Follow a manual workflow for formats, dimensions, alt text and checking the final page.

Explore

MAKE A LITTLE ROOM

Your next image, a little lighter.

Choose your format. Find your balance. Take it with you.

Start optimizing

What can we help you find?

Create responsive images for your website.

Drop your images here

One source. Every size you need.

Compare image

One source, a complete delivery

Get started with Website Ready Pack.

Bring your images.

Find your balance.

Take the lighter route.

Know your result.

Keep the workflow moving.

One image, six website files: a responsive image case study

Compression benchmarks

WordPress workflow

Your next image, a little lighter.

One source. Every size you need.