AI thumbnail maker for every video feed
Our AI thumbnail maker ships YouTube's 16:9, Shorts' 9:16, Reels' 9:16, and TikTok's vertical from one brief.
Marketing Plan
Trusted by leading teams worldwide
Why one thumbnail can't serve every platform.
Each video platform displays thumbnails differently. YouTube's suggested-video grid shows thumbnails at roughly 246 pixels wide on mobile, small enough that fine details disappear. YouTube Shorts displays in a vertical 9:16 feed where the entire thumbnail appears at once and the subject's face matters more than the text. Instagram Reels uses the same 9:16 ratio but the cover often appears overlaid with profile info, eating the bottom of the frame. TikTok pulls thumbnails from a video frame by default, but creators can override with a custom cover, and the cover competes against the autoplay preview, so it needs to read in under a second. Our AI builds the thumbnail set against each platform's actual display behavior, not a single 16:9 file cropped four different ways.
Building the thumbnail set in four moves
Soshie can summarize all the information you provide to it.
From scheduling your week to writing content and responding to messages, Sintra’s AI Agents
Key Generation Features of Soshie
eCommerce Manager
Drives online sales growth through strategy, data, and innovation.
Business
Strategist
Shapes company direction through analysis, planning, and vision.
Customer
Support
Ensures client satisfaction by resolving issues quickly.
Data
Analyst
Transforms raw information into insights guiding business decisions.
Native sizing per platform, not 16:9 cropped four ways.
Most thumbnail tools build one composition and crop it to fit each platform. Cropping is the wrong solution: a 16:9 composition cropped to 9:16 loses the visual balance the original was designed around. Our AI rebuilds the composition for each platform's ratio with the focal subject anchored where the platform actually displays it. The Shorts and Reels thumbnails aren't crops; they're separate designs from the same source brief.
Common use cases for the AI thumbnail maker
Creators publishing one video across every video platform
YouTubers who also cut Shorts, Reels, and TikTok versions of every long-form upload. Our AI ships the full thumbnail set so the creator doesn't redesign four times per video.
Brand teams running multi-platform video campaigns
Brand marketers shipping a single video asset across YouTube and short-form platforms. Our AI maintains visual consistency across the 16:9 and 9:16 formats so the campaign reads as one project.
Video agencies delivering one shoot as many cuts
Agency editors turning one shoot into 5 to 10 platform-specific cuts. Our AI handles the per-platform thumbnail assembly so the editor's hours go into the video work, not the cover design.
Power-Ups
available for Soshie
Helpers of the month, every month.
With over 40,000 entrepreneurs from more than 100 countries, Sintra is the world’s leading provider of business automation tools and AI-powered solutions, including AI for marketing, AI for customer support, and more. Sintra supports businesses at every stage of their AI implementation journey, from initial pilot phases to scaling and optimizing AI initiatives.
I can’t recommend SintraAI enough. It’s like having a personal business coach 24/7, mapping out steps to grow my company and clarifying my priorities. I feel a renewed sense of focus and control every day.
December 29, 2024 • Socrate Concepcion • US
Each AI bot tackles my to-do list, from scheduling tasks to crawling my website for SEO tips. I love how it set up calendar reminders for all my commitments. Sintra.ai is well worth every penny, especially for a busy single-person business.
December 14, 2024 • Jennifer Glenn • US
As an entrepreneur launching a new venture, Sintra.ai has made a real difference. The AI assistants are like personal staff I can rely on. And whenever I needed support, the team was on point. A must-try for any budding business!
December 21, 2024 • Custódio Barreiros • HU
I once had a large team, and although I loved my helpers, they needed constant motivation. With Sintra, there’s no drama, just new ideas that I can simply accept or reject. It’s a huge relief—100% recommended.
December 26, 2024 • Holly Wehde • US
Hiring Sintra was a great decision for my struggling boutique. They handle social media posts, guide my ads, and even offered a solution for double social media pages. Now I can focus on my inventory and customers.
December 17, 2024 • Michele Davis • US
Signed up for Sintra X—it felt overwhelming at first, but once it understood how I think, it turned into a creative powerhouse. Support is top-notch, and the daily integrations impress me.
Dec 10, 2024 • Sami Liftoff • US
I’m not usually one to give top marks, but once I got comfortable with Sintra’s 12 helpers, I was blown away by their efficiency. They churn out so many analytical ideas I have to pause and digest them. It’s sometimes overwhelming, but in a good way.
December 29, 2024 • lars • DK
Sintra integrates with all my favorite tools and these little helpers automate my tasks in a huge way. They actually learn my company’s style day by day. It’s a massive step up from generic AI chats.
December 30, 2024 • Michelangelo • IT
My life is simpler with Sintra. It handles content creation, next steps, brainstorming, and copy. I highly recommend it if you want to free up mental space for what truly matters in your business.
December 28, 2024 • Lionel D'Alvia • US
My “team” in Sintra knocks out tasks like magic, offering fresh ideas for efficiency and better customer outreach. It’s a relief knowing I have AI assistants ready to go around the clock.
December 31, 2024 • Kat Angelica • US
I’ve only been using Sintra for a couple of weeks, but the experience has been great—especially with the social media bot reaching out to me with new ideas. The pull model feels super proactive and makes me more confident in my daily tasks.
December 30, 2024 • Bayan Qandil • US
I challenge anyone to compare other platforms to Sintra.ai and their staff—you won’t find a better customer experience. Everyone is professional, responsive, and genuinely cares about helping. Truly top-notch!
December 28, 2024 • Timothy Montjoy • US
This platform helps me like a full-time employee would. As a startup, I can’t afford extra staff, so Sintra stepped in to handle complex tasks and free me up for big-picture thinking.
December 28, 2024 • Jules Kincaid • US
I’m juggling multiple hats in my business, and these 12 AI “helpers” lighten the load. They even crack jokes and celebrate milestones with me! I saved thousands in consultant fees by letting Sintra handle SEO and content tasks.
December 30, 2024 • Michelle Smith • US
This platform helps me like a full-time employee would. As a startup, I can’t afford extra staff, so Sintra stepped in to handle complex tasks and free me up for big-picture thinking.
December 24, 2024 • Domanic R.H • US
So that's Soshie.
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Thumbnail questions from cross-platform creators
What creators ask when one video has to publish to four feeds.
How is this different from the YouTube thumbnail maker tool?
Different scope. YouTube thumbnail maker focuses on the YouTube long-form thumbnail (16:9, 1280x720, suggested-feed CTR). This page covers the cross-platform set: YouTube plus Shorts, Reels, and TikTok from one brief. Use the YouTube tool when you only need a YouTube thumbnail; use this when the same video publishes everywhere.
Can our AI use a frame from my actual video?
Yes. Paste the video URL or upload the file. Our AI extracts candidate frames and proposes the strongest as a focal subject. You can also override with a different shot if the AI's pick isn't the moment you wanted.
What if the video doesn't have a person on screen?
Our AI defaults to a product close-up, a key visual moment, or a high-contrast graphic depending on the video type. For screen-recording or talking-head-only videos, the thumbnail composition shifts to a bold headline-led design rather than face-led.
Should every video in my channel use the same thumbnail style?
For series-style content, yes. A consistent thumbnail framework helps viewers recognize the series in suggested feeds. For variety content, no. Each thumbnail should fit the video's own subject. Our AI flags which approach fits your channel based on the videos you've uploaded.
Does our AI animate the thumbnails?
Static images only for now. Animated YouTube thumbnails (the 3-second hover preview) come from the video itself, not the thumbnail file. For TikTok's autoplay preview, the cover stays static and the autoplay video does the animation.
How do I A/B test thumbnails after upload?
YouTube Studio has built-in A/B testing for thumbnails on Partner Program channels. Upload two variants from our AI's output and let YouTube split-test them. TikTok, Reels, and Shorts don't have native A/B testing, so testing means publishing similar videos with different covers and comparing.
