Decision workspace

Compare your thumbnail before publishing

Upload your draft thumbnail, paste a few competing YouTube links, and see how your thumbnail reads in a feed before you publish.

Open extractor

Workspace signals

Local MVP
Local image preview1-5 public referencesCopy-ready decision summary

Next route

Open extractor

Three-step review

Put your draft beside the thumbnails viewers may see first

Everything in this MVP runs in the browser. Your uploaded thumbnail is not sent to GrabThumbs, and public references are generated from YouTube video IDs only.

Step 1

Upload my thumbnail

Use a JPG, PNG, or WebP draft. The preview stays local in your browser and is checked against YouTube thumbnail guidance.

Recommended: 1280x720, at least 640px wide, 16:9, and 2 MB or less.

Your draft preview will appear here

Choose an image to see it pinned as the first feed card.

Spec warnings

Step 2

Paste competitor YouTube URLs

Add one URL per line. GrabThumbs uses only the video ID to build public reference thumbnail URLs.

Use 1 to 5 public YouTube or Shorts URLs. Duplicate IDs are ignored.

Reference

0

Step 3

Choose feed mode

Switch the board between wider desktop cards, compact mobile feed, and a vertical Shorts crop.

Feed preview

See the draft in a competitive row before you publish

The board is a decision aid, not a reuse license. Public thumbnails are shown only as references.

Reference only - do not reuse without permission.

Add your draft and at least one reference

Once both sides are present, the board makes mobile readability and visual difference easier to judge.

Decision checklist

Mark what still survives at feed size

These are manual judgment prompts. The tool does not score your thumbnail or claim a winner.

Export

Copy a decision summary for your upload notes

The summary includes mode, reference count, spec warnings, checklist decisions, and one recommended next action.

# Thumbnail decision summary

Date: 2026-04-25
Mode: Mobile feed
References: 0
Warnings:
- None
Checklist:
- Mobile readable: no
- Subject visible fast: no
- Different from references: no
- Text short enough: no
- Promise matches title: no
Next action:
- Try stronger contrast, simpler text, or a clearer subject so the draft separates from references.

Summary is ready when you need it.

Related next tools

Use this between reference extraction and packaging checks

Open a public reference first, compare your draft, then check the title and thumbnail text before publishing.

Start here

Thumbnail Extractor

Open a public thumbnail reference before comparing your own draft against it.

Open extractor

Next check

YouTube Title Checker

Check whether the title promise matches the thumbnail you just reviewed.

Check title

Next check

Thumbnail Text Checker

Review thumbnail text length and line breaks after the visual comparison.

Check text

Related guides

Read the strategy behind the comparison

These guides help you judge contrast, audience fit, CTR repair, and reference boundaries after the board surfaces a problem.

Guide

3 fundamentals that make YouTube thumbnails easier to click

A lot of thumbnail improvement comes from boring basics done well: contrast, compression, and a clear emotional cue.

Read guide

Guide

How thumbnail design changes when your audience changes

Different age groups often respond to different levels of visual density, but your own audience data should lead the way.

Read guide

Guide

A practical guide to YouTube thumbnail color combinations

Color choices matter, but readability matters first. The best combinations are usually the ones that stay visible in the feed.

Read guide

Guide

Worried about copyright when referencing other people's YouTube thumbnails?

Referencing a thumbnail and copying a thumbnail are not the same thing. Here is the line creators need to watch.

Read guide

FAQ

Questions about thumbnail comparison

Does this upload my thumbnail to GrabThumbs?

No. The uploaded image is previewed with a local browser object URL and is not sent to a server in this MVP.

Can I reuse competitor thumbnails from this board?

No. Public thumbnails are shown as references for comparison only. Do not reuse them without permission.

Why does this not automatically search competitors by keyword?

The MVP avoids the YouTube Data API and its quota costs. Pasting a few known references keeps the tool free and predictable.

Does this use AI to score the winner?

No. This version gives you a realistic board, manual checks, and a copyable decision summary rather than AI scoring.

Site navigation

Need broader site context?

Use these pages to review how GrabThumbs works, how the guide library is handled, and where the reference-use boundaries live.

Thumbnail Extractor

Open public YouTube and Shorts thumbnail images directly from a video URL.

Guides

Read practical guides about thumbnails, click-through rate, design choices, and creator workflows.

FAQ

Find practical answers about copyright, image size, and common thumbnail research questions.

About

GrabThumbs is a utility site for opening public YouTube thumbnail images, plus an editorial guide library focused on click-through rate, thumbnail design, and creator growth patterns.

Standards

GrabThumbs publishes utility pages and creator guides. This page explains how content is reviewed, how corrections are handled, and how advertising is disclosed.

Contact

Send questions about the site, policy concerns, copyright requests, or business inquiries to the contact address below.

Privacy

Review privacy, analytics, and data-handling details for the site.

Terms

Review service terms, usage expectations, and policy-facing notices.