skwish

private

browser-based

Compress webtoon thumbnails to hit the 1080x1080 and sub-500KB cover spec

Thumbnails are the part of a webcomic upload nobody budgets for. WEBTOON CANVAS requires both a square and a vertical series thumbnail before you can publish at all: the square must be 1080x1080 under 500KB, the vertical 1080x1920 under 700KB, and episode thumbnails 202x142 under 500KB. Full-resolution cover art straight out of an art program blows past 500KB instantly — a single soft gradient background can carry the file over on its own. Skwish compresses and resizes images locally in your browser with a live before/after size readout per image, so you get under the cap without flattening the art you just spent hours on. Batch all three sizes, export a ZIP. Nothing leaves your device.

Search match

This page is tuned for compress webtoon thumbnail so visitors land in the right workflow immediately.

Fast output

See original size, compressed size, and percentage saved before you move on.

Batch ready

Compress multiple files and pull the results down as a ZIP.

Get to the compressor fast

Exact-intent SEO page first. Clear next step. Pretty later.

People usually search for a specific task, not a brand story. So this page keeps the promise simple: compress images without sending them to a third-party server.

Built for people searching “compress webtoon thumbnail”, not a generic landing page.

No uploads, no accounts, no waiting on a server.

See the savings before you download anything.

Batch export stays available when the job is bigger.

Best for this search

Compress a 1080x1080 square series thumbnail under WEBTOON's 500KB cap.

Compress a 1080x1920 vertical thumbnail under the 700KB cap.

Prepare 202x142 episode thumbnails and Tapas 300x300 thumbnails in one batch.

Compress images now

Opens the upload box on the free browser compressor.

Drop images in the browser

Keep the whole workflow local. Nothing leaves your device unless you download it.

Set the output you need

Adjust compression until the file size and quality fit the job instead of guessing.

Download a clean result

Save one file or a ZIP bundle with skwish-prefixed names so the output is easy to find.

Thumbnail spec notes

Use these before you upload or share the page.

WEBTOON CANVAS square series thumbnail: 1080x1080, under 500KB. Vertical: 1080x1920, under 700KB. Episode thumbnail: 202x142, under 500KB. All JPG/JPEG/PNG.

Quality tuning beats resizing here. Both specs are fixed pixel sizes, so drop the encoding quality until the file fits rather than shrinking the cover art.

Tapas uses a different thumbnail shape — 300x300 under 2MB, and book covers at 960x1440. Keep per-platform sets rather than one shared file.

Ready to compress images?

Open the free browser upload box, keep files local, and download the optimized result.

Compress images now

Related tools

Other compression pages built for specific size limits and formats.