The spec for Facebook Reels
If you want consistent reach on Facebook Reels, you need to hit the platform's technical targets every time. Here are the specs that matter most, distilled for quick action.
- Aspect ratio: 9:16 vertical. Export at 1080x1920. Do not upload horizontal with letterbox bars.
- Duration cap: up to 90 seconds. The current sweet spot for retention is 20 to 45 seconds unless you are teaching a step-by-step tutorial.
- Frame rate: 30 fps is safest, 60 fps works well for motion-heavy demos. Use constant frame rate to avoid A/V sync drift.
- Codec and container: H.264 in .mp4, AAC audio 44.1 kHz or 48 kHz. Target 8 to 15 Mbps video bitrate for clean text edges.
- Safe areas: Keep essential text and faces inside the center 80 percent of frame. As a practical rule, leave about 250 px padding top and bottom and 90 px on each side when designing graphics.
- Captions: Always on. Either upload .srt or burn crisp, high contrast subtitles. Auto-captions are decent but still need a manual pass.
- Sound: Reels typically autoplay with sound if the device volume is on, but many viewers still browse muted. Design for sound-on delight and sound-off clarity.
- Cover image: Set a bold frame as the cover. Make the headline legible at 1080x1920 and safe in the middle for truncated previews.
The structure that works for short-form videos on Reels
Facebook Reels rewards instant clarity, frequent state changes, and tight story arcs. Use this beat map to compose for 30 to 45 seconds, then scale up to 60 to 90 seconds only when the content earns it.
30 to 45 second blueprint
- 0-2s - Cold open visual hook: Start on motion, a punchy headline, or a surprising before-and-after. No logo stings. No faded music intros.
- 2-5s - The promise: One sentence that names the outcome and the audience. Example: "Freelance devs, fix client scope creep in 3 sentences."
- 5-15s - Step 1 with proof: Show the first action and a result, even if partial. Cut every 1.2 to 2.0 seconds. Use J cuts or on-screen text to keep momentum.
- 15-30s - Steps 2 and 3, or the core demo: Drive a clear sequence. Zoom into interfaces. Use b-roll to visualize the result. Keep lower thirds short and high contrast.
- 30-40s - Summary and CTA: Recap with a 3-beat checklist. CTA that fits Facebook: "Save this", "Comment 'Checklist' for the template", or "Follow for the full walkthrough".
- 40-45s - Optional kicker: Add a quick bonus tip or a micro-proof screenshot. End on a freeze or logo lock-up for 0.5 seconds max.
60 to 90 second expansion
- Insert a 10 to 20 second case study after the first payoff. Keep it concrete with numbers, screenshots, or a micro demo.
- Break the frame visually every 2 to 3 seconds with jump cuts, b-roll, captions, or on-screen shapes. Repetition kills retention.
- Repeat the promise in new words at the midway point. Viewers scrub and join late.
Scripting notes that consistently lift retention
- Write the hook before the body. Your first 2 seconds decide the view.
- Keep sentences 12 to 16 words. Read aloud twice. If you stumble, cut it.
- Design for silence. Every key point should be legible without audio.
- Use parallelism. Three quick verbs or three numbered steps land better than sprawling explanations.
Hooks that earn attention on Facebook Reels
Hooks are formulas, not magic. Pick a pattern that matches your topic and audience, then fill it with specifics they recognize in 0.5 seconds.
- Before vs after: "Yesterday: 17 tabs. Today: 1 keyboard shortcut." or "Before: 6 clicks. After: drag, done."
- Time-boxed payoff: "In 30 seconds, set up a dev log that writes itself." or "Give me 20 seconds, I will make your captions readable."
- Counterintuitive: "Stop fixing bugs at 9 am, fix this instead." or "Faster Reels edits with fewer cuts, here is why."
- Numbered mistakes: "3 caption mistakes that tank Reels on Facebook." or "5 audio sins killing your watch time."
- If-then targeting: "If you ship features solo, steal this handoff checklist." or "If your ads look like ads, try this hook instead."
Write ten variants, record three, publish the best. Do not negotiate with a weak opening.
Brand and voice: why your kit beats any single viral
Short-form video is a compounding channel. Consistency in look and tone trains the algorithm and your audience. A strong brand kit prevents creative drift and speeds production without making every clip feel the same.
Build a lightweight brand kit for Reels
- Colors: Pick one primary and one accent. Test legibility on low-end screens. Keep captions high contrast.
- Typography: Use a single sans-serif for on-screen text. Set weight rules for headers and body. Predefine font sizes for 1080x1920.
- Graphic elements: Two lower-third styles, one sticker style, one overlay pattern. Keep them inside safe areas.
- Voice and tone: Decide your verbs, pacing, and POV. For developer-friendly audiences, keep claims precise and examples reproducible.
- CTAs: Standardize two endings: save or comment for resources, and follow for deeper dives. Rotate to avoid fatigue.
Tooling that supports per-project brand kits helps you ship fast without sacrificing consistency. HyperVids lets you attach a project-specific kit - colors, fonts, lower thirds, watermark, and voice presets - so every cut aligns with your identity while leaving room for creative variation.
Captions and accessibility that boost completion rate
Reels that assume sound kill reach. Make every clip understandable, scannable, and friendly to assistive tech.
- Always add captions: Upload .srt or burn in subtitles. Auto-captions are a good first pass but rarely nail technical terms or brand names.
- Line length: Keep to 32 characters per line, max two lines. Break on phrase boundaries. Avoid punctuation mid line.
- Reading speed: 150 to 170 words per minute in aggregate for subtitles. That is roughly 12 to 14 characters per second.
- Contrast: Aim for a minimum 4.5:1 contrast ratio. Use a semi-opaque backdrop or stroke for text over cluttered footage.
- Placement: Sit subtitles above the bottom UI bar. Maintain at least 250 px bottom padding and 90 px side padding.
- Text hierarchy: Emphasize 2 to 3 keywords per sentence with bold or color, not all caps everywhere. Do not animate every word.
- Motion hygiene: Keep caption animations under 200 ms. Too much motion strains viewers and trips compression artifacts.
- Language options: If your audience spans regions, publish alternates with translated captions. Keep brand terms consistent.
A sample HyperVids prompt for a Facebook Reels short
Here is a realistic one-line prompt that feeds a brand context and outputs a vertical talking-head tutorial for Facebook Reels:
"Create a 35 second vertical Reels tutorial for freelance software developers on stopping scope creep. Hook: 'Clients do not change their mind, your contract is vague.' Steps: 1 define change requests, 2 introduce a decision tree, 3 show a one-sentence reply template. Tone: direct, technical but accessible. Visuals: talking head plus animated captions, bold keywords highlighted, cutaway to a 3-step checklist. CTA: 'Comment CHECKLIST to get the template'. Ensure 9:16, high contrast subtitles, safe area respected."
With the project's brand kit attached, HyperVids parses the prompt, applies your colors and typography, renders a talking-head cut with animated lower thirds, generates on-brand captions, and exports a 1080x1920 .mp4 around 35 seconds with a cover frame and safe margins set for Facebook.
If you prefer a CLI-style flow, add your brand context and call the /hyperframes skill in your workflow, then pass a single prompt line like the one above. HyperVids handles the visual system so you can iterate on hooks and structure.
Common failure modes on Facebook Reels
- Soft openings: Logo stings, long music intros, or throat clearing lose 70 percent of viewers by second 2. Start with motion and meaning.
- Wrong aspect ratio: Cropped horizontal exports or 1:1 squares look cheap and reduce watch time.
- Text outside safe zones: Captions or headers under the scrub bar or behind UI elements are unreadable.
- Overwritten captions: Walls of text, tiny font sizes, or low contrast create instant drop offs.
- Variable frame rate recording: Causes subtle A/V desync after platform transcode. Lock to a constant frame rate before export.
- No mid-video state changes: Static talking head for 45 seconds feels like a meeting. Cut, zoom, or swap angles every 2 to 3 seconds.
- Music licensing: Using unlicensed tracks risks muting. Use in-app catalog or licensed audio.
- CTA mismatch: Asking viewers to click off platform kills completion. Use save, comment, or follow oriented CTAs.
- Overlength without payoff: If the first proof of value shows up after 15 seconds, most viewers will not see it.
Conclusion: ship fast, iterate on hooks, protect the brand
Winning Facebook Reels are built on fundamentals - clean 9:16 exports, ruthless hooks, tight beats, readable captions, and a consistent brand voice. Nail the spec, script for silence, show proof early, and ask for one action. Tools that let you lock a brand kit and generate on-model cuts will shorten your feedback loop and keep you from reinventing the look for every video.
If you already have your kit and a backlog of topics, a single-line prompt plus your preset is enough to publish daily. HyperVids turns that prompt into a vertical cut aligned to your colors, typography, and voice, so you can spend your attention on better hooks and clearer demos.
FAQ
What is the ideal length for Facebook Reels right now?
Plan for 30 to 45 seconds for most topics. Go to 60 to 90 seconds only when you have additional proof or steps that genuinely improve understanding. Short, dense value beats long, meandering explanations.
Should I record at 60 fps for Reels?
If your video has fast motion or UI zooms, 60 fps looks crisp after platform compression. For straight talking head, 30 fps is fine and compresses well. Whichever you choose, export at a constant frame rate.
How do I pick a cover frame that performs?
Grab a frame where your face is expressive and the headline is legible over a clean background. Keep headline text inside the center safe area, 8 to 12 words, high contrast, and consistent with your brand kit. Avoid busy b-roll or tiny type.