Design click-optimized YouTube thumbnails by compositing bold text, cutout images, and effects on a 1280x720 smart canvas. Creators A/B-test two variants per video — runs locally, free to start with fair limits.
Runs on Canvas
Content reviewed October 2026 · About Toolzum
Score text for AI authorship with burstiness, repetition, and trigger-phrase analysis — percentage plus per-section breakdown. Teachers screen a 2,000-word essay in seconds — runs locally, free to start with fair limits.
Composite a face from one photo onto another with manual position, scale, and blend controls on canvas. Meme makers and designers align swaps by hand — runs locally, free to start with unlimited saves.
Catch grammar, spelling, and punctuation errors with in-browser pattern matching — homophones, run-ons, misplaced commas. Writers proofread a 1,000-word draft in seconds — runs locally, free to start with fair limits.
YouTube thumbnails in your browser: opens with a centered 16:9 frame, add bold text and shapes, tune contrast for small-size pop, export JPG. Free, no signup, nothing uploads.
Design simple logos with text, tagline, and 5 preset icons on canvas — export PNG/SVG. Draft startup marks in an afternoon — local Canvas work, unlimited saves.
Three elements: a 1280x720 frame readable at 120px wide, 3–5 high-contrast words, and one expressive face or object. Example: 'I Tried 30 Days' in yellow on dark blue with a surprised cutout outperforms a busy 20-word collage every time.
No — compositing runs locally in your browser on canvas, so your images and text stay on your device. Only the final PNG/JPG export counts toward the Pro download quota (signed-in free: 2 a day; Pro unlimited).
Export 1280x720 JPG under 2 MB — YouTube's recommended thumbnail spec. Keep text inside the central 80% so nothing clips on mobile, and preview at comment-avatar size: if you cannot read it tiny, simplify before uploading.
Yes — build a template with fixed font, colors, and logo position, then swap only the background and headline per video. Channels with a consistent template earn recognition clicks; save variants and compare click-through after 7 days.
AI Image Generator
Turn text prompts into high-resolution images with three engines: free Pollinations drafts, 1-credit FLUX drafts, and 5-credit Gemini HD for Pro. Designers prototype hero art in seconds — free to start, sign in for credits.
Social Caption Generator
Generate platform-tuned social captions with mood, tone, hashtags, and CTA in one click. Fill a week of posts in minutes — local template engine, unlimited saves.