YouTube thumbnails on autopilot

Consistent thumbnails grow channels, but making one per video in an editor eats hours. Define your thumbnail as a Rendry template: 1280×720 canvas, outlined display type, subject cutout, arrow stickers, your palette. Then every new video is one API call with {title} and {photo}, or one sentence to your AI agent, which designs, previews and renders it over MCP.

The gallery ships three ready thumbnail styles; clickbait, tutorial, review; that you can clone and rebrand in minutes. Background removal is built in: upload a frame, get a clean subject cutout with a glow.

Start free; 100 renders/month · Documentation

Why teams and agents use it

  • Exact 1280×720 output. No cropping surprises: the canvas is fixed, text auto-fits, safe margins are part of the template.
  • Readable at 120 px wide. Outlined type, text plates and high-contrast palettes are native layer features, not Photoshop tricks.
  • Subject cutouts. remove_background turns any frame into a transparent PNG cutout; add glow/shadow layers for the MrBeast look.
  • Batch the backlog. Re-render every old video thumbnail in a new style by looping render_batch over your video list.

Ready-made templates for this

  • YouTube Clickbait Thumbnail: YouTube 1280x720 clickbait. Photo background, huge white stroked words + yellow money line, red arrow, corner badge. Mood: maximum urgency. Use for: challenges, experiments, vlogs. (1280x720)
  • YouTube Tutorial Thumbnail: YouTube 1280x720 dev tutorial. Dark code aesthetic, green-cyan neon gradient title, terminal window, orange STEP badge. Mood: clean technical. Use for: coding tutorials, how-tos. (1280x720)
  • YouTube Review Thumbnail: YouTube 1280x720 review. Blue mesh + grain, tilted product photo card with shadow, star rating, green verdict plate. Mood: trustworthy expert. Use for: product reviews, comparisons. (1280x720)
  • Subject Glow Poster: Poster with a background-removed subject popping over a designed glow background. Mood: editorial depth. Use for: hero posters from a photo. (1080x1350)

Built for AI agents, not just humans

Rendry ships a native remote MCP server (https://rendry.io/api/v1/mcp) with 25 tools. Your agent designs templates from raw JSON DSL, previews them for free, then renders batches. Full control over every pixel stays with the agent, while a human can always open the same template in the visual editor and adjust it. No headless browser, no screenshot hacks, no glue code.

Machine-readable: llms.txt · llms-full.txt · openapi.json · mcp.json

Frequently asked questions

Can it generate a thumbnail from just a video title?
Yes, if your template maps {title} to the headline layer; POST the title and get the PNG. With an agent connected over MCP, you can also ask for layout variations and pick the best preview.
Do the thumbnails pass YouTube requirements?
Templates render at 1280×720 (16:9) PNG under 2 MB by default; within YouTube specs. Text size and contrast are locked in the template, so every thumbnail stays legible.
Can I A/B test thumbnail designs?
Keep two template versions and render both per video; filenames are per-render, so wiring into your A/B tooling is one loop.

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