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Check a video

Free AI review and one-click fix for video ads

Score your video ad. Make it sell in one click.

Quelta reviews a short vertical ad like a strict creative director, for your audience’s country, age and platform. Then one button rebuilds it into a version that sells, in any language and for any market.

Scored for TikTok · United States · Millennials

  1. Score it for free

    A preliminary 0–100 score, 30+ metrics and the first 3 seconds reviewed, in about a minute. The full check pins every mistake to a timecode.

  2. Fix it in one clickPrivate access

    A new video with a stronger hook, subtitles, pacing and offer. As many versions as you need, for every market.

Check my video for free See before and after

Free · up to 5 videos a day · no sign-up

Before

Needs serious work

After

Strong ad

A real example: the same seller, the same sneakers

Before and after

One phone video, two steps: 22 → 94

A sneaker maker filmed himself on his phone, in Chinese, in one take. Quelta scored the video for TikTok in the US, then rebuilt it: same person, same sneakers, same workshop.

Step 1

Score

Full review for TikTok · United States · Millennials

Before

One take on a phone

Needs serious work

A strong factory-direct story and a fair price, but US viewers will neither understand nor act on it.

  • Hook38issues: 4
  • Story & structure49issues: 6
  • Offer & CTA24issues: 6
  • Audience & delivery32issues: 6
  • Picture & text52issues: 3
  • Sound82issues: 2

Top mistakes found

  • 00:00–00:29Chinese only, no subtitles: a US viewer won’t understand a word
  • 00:00–00:03No hook in the first 3 seconds: it opens with “Hi everyone”
  • 00:26–00:28No call to action: it ends with “That’s all, thank you”

+ 24 more, each with a fix

Step 2

Fix in one click

Rebuilt for the US: English, a hook, subtitles, pacing and an offer

After

Rebuilt for TikTok in the US

Strong ad

A tight, well-built ad: the hook, the story and the call to action all work.

  • Hook100no issues
  • Story & structure100no issues
  • Offer & CTA86issues: 1
  • Audience & delivery100no issues
  • Picture & text89issues: 1
  • Sound100no issues

Measured: before → after

  • Speech covered by subtitles0%100%
  • Hook in the first 3 sNoYes
  • Average shot length28.6 s1.9 s
  • Product on screen15%100%
  • Call to actionNoYes

What changed

7
  1. Language

    Before: Chinese only, no subtitles

    After: English for the US, subtitles word by word

  2. First 3 seconds

    Before: “Hi everyone” and 7 seconds about himself

    After: A hook from the first second: “Ten years making sneakers for big brands. These ones are mine.”

  3. Pacing

    Before: One static shot for 29 seconds

    After: 11 short shots: the knit, the sole, the weight on a scale, a walk, the fit

  4. Product

    Before: Small in the frame, leaves it at the end

    After: On screen for the whole video, with close-ups of the knit and the sole

  5. Offer

    Before: The price said once, in passing

    After: $69 against $120+ for big-brand knit sneakers, free US shipping and returns

  6. Brand

    Before: “风” said once, never shown

    After: FENG 01: spelled out by voice, on screen and on the end card

  7. Ending

    Before: “That’s all, thank you”

    After: “Tap Shop Now!” and an end card with the price and a button

Both scores are real Quelta reviews of these videos for TikTok in the US, audience: Millennials.

Check your video for free

Mass localization

One ad, every market. Localized, not just translated

Generate versions for other countries, languages, ages and platforms at once. Quelta adapts what local buyers respond to: the language and the subtitles, the delivery and the pace, and what the offer leads with.

  • US United StatesEnglish

    Leads with the price

    $69, not $120+ for a logo

  • DE GermanyGerman

    Leads with quality and free returns

    Kostenlose Rücksendung

  • BR BrazilPortuguese

    Leads with installments and a discount

    Em até 3x sem juros

  • JP JapanJapanese

    Leads with craft and detail

    職人の手仕事

Examples of what an ad can lead with in different markets. Versions for other markets are generated in private access.

How it works

From a raw video to versions that sell, in three steps.

  1. Upload a video or paste a link

    Any vertical ad: your own, a contractor’s or a draft. Choose the platform, the country and the age of your audience.

  2. Get the score and the fixes

    Free: a preliminary score range, a checklist of 30+ metrics and the first 3 seconds reviewed. Full check: the exact score, every mistake with a timecode and the fixes in order of impact. Your first full check is free.

  3. Generate videos that sell in one click

    Quelta rebuilds the ad and makes as many versions as you need: for other countries, languages, audiences and platforms.

    Private access

What Quelta checks

Six categories and more than 30 measurable metrics, from the first second to the call to action. Every check takes into account the platform, the country and the age of your audience.

  • Hook

    Whether the first 3 seconds stop the scroll: motion, the first word, when the product appears.

  • Story & structure

    Whether the script leads to a purchase: problem, demo, proof, pacing and no empty stretches.

  • Offer & CTA

    Whether the viewer understands what to buy, why now and what to do next.

  • Audience & delivery

    Whether the delivery fits the audience: language, speech rate, tone and the presenter on screen.

  • Picture & text

    Format, sharpness, light, cuts, product on screen and text inside the platform’s safe zones.

  • Sound

    Loudness, voice against music and noise, clipping, pauses and filler words.

Sample report

What the full report looks like

Every video gets a report like this. The example is illustrative: a 35-second hand cream ad with typical mistakes.

Sample reportAn illustrative example, not a real client’s video.

Decent, but losing viewers

A clear product demo, but the opening loses viewers and the ending does not tell them what to do.

Product: Shea butter hand cream

Score potential: 64 → 99

Score by category

  • Hook45issues: 2
  • Story & structure66issues: 1
  • Offer & CTA52issues: 2
  • Audience & delivery80no issues
  • Picture & text74issues: 1
  • Sound63issues: 1
Video frame
34.5 s · 720×1280 · 9:16
Private access

Fix it in one click

Metrics checklist

Facts measured in the video. Each one is compared with what works on vertical video platforms.

23 passed6 warnings5 failed

Basics

  • Passed: Audio trackYes
  • Passed: Voice / speechYes
  • Passed: SubtitlesYes
  • Passed: Speech covered by subtitles86%Target: ≥ 80%
  • Passed: Vertical 9:16Yes
  • Warning: Length for the platform34.5 sTarget: 15–30 s

First seconds

  • Failed: Hook in the first 3 sNo
  • Warning: First word at1.9 sTarget: ≤ 0.5 s
  • Warning: Motion in the first second14Target: ≥ 40
  • Failed: Product first shown at5.8 sTarget: ≤ 2 s

Picture

  • Passed: Resolution720×1280Target: ≥ 720×1280
  • Passed: Cuts11Target: ≥ 6
  • Passed: Average shot length2.9 sTarget: 1.5–4 s
  • Passed: Static frames22%Target: ≤ 30%
  • Passed: Product on screen71%Target: ≥ 50%
  • Passed: Person on screen54%
  • Passed: Black barsNo
  • Passed: Foreign watermarkNo
  • Passed: Lighting / exposureYes
  • Passed: SharpnessYes
  • Failed: Text inside safe zonesNo

Sound and voice

  • Warning: Loudness−19.4 LUFSTarget: −16…−8
  • Passed: Peak level−2.1 dBTPTarget: ≤ −1
  • Passed: Clipping / distortionNo
  • Warning: Voice vs background noise14 dBTarget: ≥ 20
  • Passed: Constant background noiseNo
  • Passed: MusicYes
  • Passed: Speech rate164 wpmTarget: 140–180
  • Warning: Filler words2.4 per minTarget: ≤ 2
  • Passed: Long pauses1Target: ≤ 1
  • Passed: Unclear words3%Target: ≤ 5%

Offer

  • Passed: Brand named or shownYes
  • Failed: Call to actionNo
  • Failed: Price or offerNo

Timeline

Everything on one time axis. Click a marker to open the mistake.

Script strengthDelivery energyScroll riskMistakes
Shots
Script
Hook
Problem
Demo
Solution
Proof
Other
Scroll risk
Script strength
Delivery energy
Loudness
Motion
Mistakes
0:000:050:100:150:200:250:30

Where it sags:

Script strength — how much a moment moves the viewer towards buying. Delivery energy — pace and expressiveness of the presenter. Both are model estimates, 0–100. Scroll risk shows where the video sags: weak script, flat delivery, a static picture, silence or a mistake at that moment. It is not a retention forecast.

Mistakes found

From the most serious to minor ones. Each mistake shows where it is in the video and how sure we are.

  1. CriticalHook

    The product appears only at 5.8 s

    For the first 6 seconds the viewer sees only a face and hears about the problem. Most people decide whether to keep watching in the first 2–3 seconds, so many will scroll away before they see the cream.

    In the video: Shots 1–2: the presenter talks to the camera; the jar first enters the frame at 0:05.8.

    Proven practiceHigh confidence
  2. CriticalOffer & CTA

    The video ends without a call to action

    The last 4 seconds show only the product name. The viewer does not learn where to buy it or what to do next, so even an interested viewer has no reason to act now.

    In the video: 0:30.5–0:34.5: end card with the name, no voice-over and no prompt to tap or follow a link.

    Proven practiceHigh confidence
  3. MajorHook

    The first word comes at 1.9 s after a still frame

    The opening second has almost no motion (14 of 100) and no sound. In a feed that autoplays without sound, a still first frame is easy to scroll past.

    In the video: 0:00–0:01.9: the presenter looks at the camera in silence.

    Proven practiceHigh confidence
  4. MajorPicture & text

    Captions overlap the platform interface

    Captions sit in the bottom 15% of the frame, where Reels and TikTok show the caption, the account name and the buttons. Part of the text will be covered.

    In the video: The caption “Shea butter + urea” at 0:08.3 is placed 120 px above the bottom edge.

    Platform ruleHigh confidence
  5. MajorSound

    The voice is quiet and the music drowns it out

    Average loudness is −19.4 LUFS against the recommended −14. From 0:12 to 0:18 the music is almost as loud as the voice, so the key benefit is hard to hear.

    In the video: 0:12.9–0:18.0: “It keeps my hands soft the whole day. Even after washing the dishes.”

    Proven practiceHigh confidence
  6. MajorOffer & CTAWhole video

    No price and no offer

    The video does not mention the price, a discount or a reason to buy now. For an inexpensive product, a clear offer is often what turns interest into a purchase.

    In the video: Neither the speech nor the on-screen text mention a price, a discount or a bundle.

    Proven practiceMedium confidence
  7. MinorStory & structure

    The middle repeats the same benefit three times

    From 0:13 to 0:25 the presenter says “soft all day” three times in different words. This slows the pace exactly where the video could show proof.

    In the video: “It keeps my hands soft the whole day.” · “The softness lasts all day.” · “Really soft hands all day long.”

    Model opinionMedium confidence

How to fix it

Start from the top: the first fixes give the biggest gain.

  1. Show the cream in the first second+10 → 74

    Open with a close-up: cream squeezed onto a dry hand, with the caption “Cracked hands in winter?”. Say the problem in the first sentence, without a pause.

    Fixes: The product appears only at 5.8 sThe first word comes at 1.9 s after a still frame

  2. End with a call to action and an offer+10 → 84

    Add a voice line and a caption at the end: where to buy and why now, for example “Order via the link in bio: 2 tubes for the price of 1 until Sunday”.

    Fixes: The video ends without a call to actionNo price and no offer

  3. Make the voice louder than the music+6 → 90

    Normalise the audio to about −14 LUFS and lower the music by 10–12 dB under speech, especially from 0:12 to 0:18.

    Fixes: The voice is quiet and the music drowns it out

  4. Move the captions into the safe zone+7 → 97

    Keep text in the middle of the frame: above the bottom 20% and away from the right edge, where the buttons are.

    Fixes: Captions overlap the platform interface

  5. Replace the repetition with proof+2 → 99

    Cut 0:18–0:25 down to one phrase and use the time for a before-and-after close-up or a short customer review.

    Fixes: The middle repeats the same benefit three times

What already works

  • Clear close-ups of the texture and how fast the cream absorbs (0:08–0:13).
  • Natural delivery: the presenter speaks to the camera and keeps eye contact.
  • Good lighting and a sharp picture throughout.
  • Subtitles cover 86% of the speech, so the video works without sound.
Speech transcript
  1. My hands get so dry in winter that the skin literally cracks.
  2. I tried a dozen creams and nothing really helped.
  3. This one has shea butter and urea, and look how fast it absorbs, no greasy film at all.
  4. It keeps my hands soft the whole day.
  5. Even after washing the dishes.
  6. Honestly, the softness lasts all day, I just apply it in the morning.
  7. So yes, um, really soft hands all day long, I love it.
  8. After one week my hands look like this. No more cracks.
  9. Shea Hand Cream.
Private access

Fix it in one click

Quelta rebuilds the video from this review: a new opening, subtitles, pacing, balanced sound and a call to action, plus versions for other markets and languages.

Check your video

Reports and videos are kept for 7 days and then deleted automatically. The review is a recommendation based on automated analysis. It does not guarantee ad results.

Free review

Check your own video

Upload a vertical ad or paste a link. The preliminary report is ready in about a minute and stays at its link for 7 days.

  • A preliminary 0–100 score for your platform, country and audience age
  • 30+ metrics and the first 3 seconds reviewed, up to 5 videos a day, no sign-up
  • The full check: every mistake with a timecode and how to fix it. The first one is free

Free · up to 5 videos a day

By sending a video, you confirm that you have the right to use it and accept the Terms of Use and the Privacy Policy.

Why it pays to check the video first

The creative is the biggest driver of ad results, and it wears out fast. A mistake in the first seconds costs more than any targeting setting.

49%

of the incremental sales an ad drives come from the creative itself, more than brand, reach and targeting combined.

NCSolutions, 2023

5–7 days

is how long an ad creative lasts before fatigue sets in. The platform advises uploading new creatives every week.

TikTok for Business, 2024

$154

is the average actual payment for one UGC video from a creator. At 5–7 new videos a week, testing adds up fast.

Collabstr, 2026

−19%

cost per acquisition when creator-style content is added to regular ad campaigns (meta-analysis of 12 lift studies).

Meta, 2024

One-click fix and generationPrivate access

Turn any ad into videos that sell, at scale

The fix and the generation already work. We open them to brands and agencies one by one, so every team gets help with the setup. Write to us, and we will give you access.

  1. Send a video or a product link

    Your current ad, a draft, product photos or just a link to the product page.

  2. Quelta fixes what loses sales

    The hook, subtitles, pacing, sound, offer and call to action, based on the review.

  3. Localize for every market

    The language, the delivery and what the offer leads with, adapted to local buyers.

  4. Get ready-to-post videos

    Vertical 9:16 for TikTok, Reels, Shorts and ads, as many versions as you need to test.

We don’t copy other people’s videos. We keep the mechanics that sell (script, pacing, delivery) and make a new video about your product.

Request access

Questions and answers

What is Quelta?

Quelta does two things with short vertical video ads. First, it checks how well a video sells on a given platform, in a given country and for a given audience age. The preliminary check is free; the full check shows every mistake with a timecode and how to fix it. Second, in one click it rebuilds the video into a version that sells and makes versions for other markets and languages. The fix and the generation are available in private access.

What is free and what is paid?

The preliminary check is free: up to 5 videos a day, no sign-up. It gives a score range, a checklist of 30+ metrics and a review of the first 3 seconds. The full check gives the exact score, every mistake with a timecode and how to fix it. Sign in with Google and your first full check is free; packs of full checks are in early access. To count the daily limit we use one functional cookie; signing in adds a session cookie.

What does the one-click fix do?

Based on the review, Quelta rebuilds the video: a hook in the first seconds, subtitles, tighter pacing, balanced sound, a clear offer and a call to action. You get a new video, not a list of tips. The before and after example on this page was made this way: from 22 to 94.

Is localization just a translation?

No. Besides the language and the subtitles, Quelta adapts what the ad leads with to local buyers: in one market it is the price, in another a discount or installments, in a third quality and free returns. The delivery, the pace and the text on screen change too.

How do I get private access?

Leave your email in the form on this page. We open access to brands and agencies one by one and get in touch to discuss your products, markets and volumes.

Which videos can I check?

Any vertical video ad up to 100 MB and 3 minutes long: TikTok, Instagram Reels, YouTube Shorts, X, Snapchat. Upload a file or paste a link to a public post.

How long does it take?

Usually 1–3 minutes. You can close the tab: the report opens at its link for 7 days.

What happens to my video?

The video and the report are kept for 7 days and then deleted automatically. We do not sell videos, do not share them except with the processors needed for the analysis and do not use them to train models. Details are in the Privacy Policy.

How is the score calculated?

The score is built from six categories: hook, story, offer, delivery, picture and sound. Some checks are measured precisely (loudness, cuts, subtitles), others are assessed by AI models. Each mistake shows whether it is a platform rule, a proven practice or the model’s opinion, and how sure we are.

Does a high score guarantee results?

No. The review is a recommendation: it finds typical mistakes that cost views and sales. The result also depends on the product, the offer, the audience and the ad settings.

In which languages does it work?

The site and the report are available in English, French, Spanish, German, Kazakh and Russian. The video itself can be in any common language.

Get private access to one-click fixes

The fix already works, and we open it to teams one by one. Leave your email, and we will give you access.