Thumbnail Tools100% In-Browser ExecutionYouTube 2026 Ready

YouTube Thumbnail Compressor

Compress up to 10 JPEG, PNG, or WebP thumbnails locally. Compare each result and download images individually or together as a ZIP.

Workbench Controls

INPUT // LOCAL

Select thumbnailsStays on your device

Choose images or drag them here

JPG, PNG, or WebP · Maximum 20 MB per image

No image handy? Try a creator sample:1-click test

Up to 10 images · 20 MB each · 50 MB total. Selected files replace the current batch. Sample buttons load one image.

Target size per image

Export format

Dimensions stay unchanged. JPEG is lossy and replaces transparency with white.

Advanced quality settings

Maximum quality90%

25%95%

The compressor searches down to 25% quality to try to meet your target. Inspect small text and edges.

Choose one image or a batch to begin.

Images are processed sequentially in your browser without uploads or saved batches. Reset or leave to clear them. Completed outputs are capped at 60 MB total.

Output & Inspection

LIVE SPEC

Batch results

The ZIP includes completed outputs only, even when a size target was missed. Unique numbered filenames prevent collisions.

Compress your images, then select a completed image to compare the original and output and download it individually.

Demonstration // Sample Inputs

Before and After Inspection

A fictional example processed with this tool. Your image and settings will produce different results.

Drag or scrub slider to compare

◂▸

Before · original JPEG

After · compressed JPEG

1600 × 1000 px · Demonstration Reference

Download original JPEG·Download processed JPEG

Same 1600 × 1000 dimensions. JPEG, 2,000 KB target, maximum quality 90%. File sizes below are measured from these example files; results vary by image and browser.

Execution Playbook

How to use this tool

Standard workflow recommendations for consistent publish quality

STEP // 01
Select your image
Select 1–10 still JPEG, PNG, or WebP thumbnails, up to 20 MB each and 50 MB total. Files are processed one at a time.
STEP // 02
Choose a size target
Set the size target per image and a shared output format. Advanced settings limit JPEG or WebP quality.
STEP // 03
Compare and download
Compress the batch, review each completed output, and download individually or as a ZIP. Failed or cancelled files are excluded from the ZIP.

Reference & Standards

About YouTube Thumbnail Compressor

Every image uses the same target, format, and maximum quality settings. Changing settings or selecting a replacement batch clears previous outputs so you cannot download results from stale settings. Removing an individual image keeps the other completed results.

Dimensions are preserved. Re-encoding can change colors or remove embedded metadata. If the original is retained, its metadata is retained too. Samples load one image; upload multiple files to test a batch.

Check YouTube’s current thumbnail guidance before uploading.

Documentation & FAQ