One photo in · Only the length changes · Nothing to install
Find out what you would look like with long hair before you spend two years growing it. One photo, same face, new length.
A real length change, produced on this page’s model. Drag the divider: the same woman, the same cream top, the same grey studio backdrop and the same expression — the pixie cut has become dark waves well below the shoulders, with the parting and the shadows on the shoulders rendered to match. Every output is AI-generated, so your own result varies with the photo you upload — read this as a guide to what the tool does, not a fixed result you will get back.
Drag to compare before and after
It answers a question that is otherwise expensive to answer: what would I look like with long hair? Growing it out takes one to three years depending on where you are starting from, and the awkward middle is the part people quit during — so seeing the destination first is worth a lot.
Upload a photo and the same person comes back with hair grown well past the shoulders, with realistic volume, a natural parting, individual strands and soft shadows where the hair rests on the shoulders and the top. What must not change does not change.
The face, the skin tone, the expression, the clothes, the pose, the lighting and the background all carry over, because a preview is only useful if the length is the only thing that moved — if the face shifts too, you are looking at a different person and learning nothing. That is also why this is different from a novelty app filter, which typically pastes a generic wig shape over your head at a fixed angle and falls apart the moment you turn.
The length change runs on the Nano Banana image model, in the browser, with free credits to start. Add the photo you already have — image-to-image is the default — set the format, and the credit estimate updates before you commit; a failed run is refunded automatically (unless it broke the content policy). One practical note: the shorter your current hair, the more the model is inventing rather than extending, so a buzz cut is a harder starting point than a bob.
It still works, but treat the result as an idea of the shape rather than a promise about your exact hair.
Creative engine
Upload a photo, say how long and what texture, pick the format, and the credit estimate updates before you generate.
Grows the hair on your own face rather than showing you a style on a model.
Keeps the face, expression, clothes, lighting and background fixed so only the length changes.
Renders real volume, parting and strand detail instead of pasting a wig shape over the head. This is the patient version of the idea — the bald filter goes the other way on the same photo, and the hair growth clip turns the change into video.
From one photo to a believable preview, with the cost shown before you commit.
Face the camera in even light with your whole head and shoulders in frame. Hair pushed back off the face gives the model a clean hairline to build from.
Mid-back, past the shoulders, collarbone length — and add the texture, because straight, wavy and curly at the same length look like three different people.
Generate, then judge the length against the photo you started from. A failed run is refunded (unless it broke the content policy), so comparing two lengths costs nothing but the wait.
Growing it out, cutting it off, or settling an argument about which suits you.
Growing hair out takes one to three years, and most people quit in the awkward middle. Seeing the destination makes the middle easier to sit through.
Bring a picture of the length on your own face instead of a photo of someone else, so you are both discussing the same outcome.
Going the other way is instant and irreversible. Seeing your face with the length you are about to lose is a cheap second opinion.
Common questions about previewing extra length on your own photo with Kavel.
It does, and that is the honest answer to what people are really asking. The face itself is meant to carry over unchanged and on a clear straight-on photo it does — but a length past the shoulders covers the jawline and narrows the visible outline of the head, so the same face can look longer or softer than you are used to. If the preview feels subtly off, that framing effect is almost always the reason rather than the model having altered your features, and it is genuinely what the length would do to you.
Yes, but with a caveat worth knowing. The shorter your hair now, the more the model is inventing rather than extending — from a buzz cut it has almost nothing to work from except your hairline and hair colour. The preview is still useful as a shape and a colour test; just do not read it as a prediction of exactly how your hair will fall.
Yes, and you should. Say collarbone, past the shoulders or mid-back rather than just longer, and name the texture — straight, wavy, curly, coily — because the same length reads completely differently across textures. Adding your natural texture rather than the one you wish you had gives the more honest preview.
No. Those overlay a fixed hair shape onto your head, which is why they slip when you turn and why the hair never quite sits on your shoulders. Here the hair is rendered into the photograph with its own volume, parting and shadows, so it belongs to the picture rather than floating over it.
You can, but do it as a second run. Changing two variables at once makes the preview hard to judge — you will not know whether it is the length or the colour you are reacting to. Get the length right first, then change the colour on top of it.
Scalp hair grows roughly half an inch a month for most people, so going from a short cut to past the shoulders is commonly a two to three year project, and collarbone length around one to two. That range is exactly why previewing is worth a minute: the decision you are making is a multi-year one.
The estimate moves with the format and resolution you pick, so the cost is visible first. Failed runs are refunded automatically (unless it broke the content policy), and new accounts start with free credits — enough to compare two lengths before spending anything.
Only with their agreement. Editing someone's appearance and sharing the result without asking is not a use we want to see, and depending on where you are it can carry real legal weight. Your own face is always fine, whatever the style.
One credit pool covers Nano Banana images and Seedance and Veo video. The cost shows before every run, and failed jobs are not charged. Use a subscription for ongoing work, or a one-time pack when you just need to top up.
What's included
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What's included
Secure checkout by Stripe. Card details never touch our servers.
What's included
Secure checkout by Stripe. Card details never touch our servers.
What's included
Secure checkout by Stripe. Card details never touch our servers.
One-time top-ups — buy extra credits any time you run low.
What's included
Secure checkout by Stripe. Card details never touch our servers.
What's included
Secure checkout by Stripe. Card details never touch our servers.
What's included
Secure checkout by Stripe. Card details never touch our servers.
Charges appear as “KAVEL AI” on your card statement. You can cancel any time from Settings → Billing; cancellation takes effect at the end of the period you already paid for.
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Use one balance across every supported image and video model — eleven of them today, listed below — and check the credit cost before each request.
Video models
Image models
Model credit guide
You're only charged for successful generations. The exact estimate in the generator varies by model, length, resolution, audio, and number of images.
| Type | Model | Credit cost |
|---|---|---|
| Video | Seedance 2.5 | The long-take tier, priced per second: 5s 480p ≈ 211 credits, 5s 720p ≈ 473. A full 30s take runs ≈ 1,260 at 480p and ≈ 2,835 at 720p. Supplying a reference clip lowers the per-second rate. |
| Video | Seedance 2.0 | 5s 720p image-to-video ≈ 188 credits; text-to-video ≈ 308 credits. Scales with resolution and length. |
| Video | Seedance 2 Fast | Faster and lower cost. 5s 720p text-to-video ≈ 248 credits. |
| Video | Seedance 2 Mini | The cheapest Seedance tier. 5s 720p ≈ 154 credits, 5s 480p ≈ 72 credits. |
| Video | Seedance 1.5 Pro | Audio doubles the rate. 5s 720p ≈ 27 credits silent, ≈ 53 with audio; 1080p ≈ 57 and ≈ 113. |
| Video | Veo 3.1 | Billed per video, not per second (Lite tier). About 45 credits at 720p and 53 at 1080p. |
| Video | Kling 3.0 | Audio raises the rate. 5s 720p ≈ 105 credits silent, ≈ 150 with audio; 1080p ≈ 135 and ≈ 203. |
| Video | MiniMax H3 | Fixed 2K, no resolution ladder. Priced per second — a 5s clip ≈ 158 credits. |
| Image | Nano Banana 2 | Generate or edit from text and images. About 8 credits per 1K image, 12 at 2K, 18 at 4K. |
| Image | Nano Banana Pro | Consistent run times across generations. About 12 credits per 1K or 2K image, 21 at 4K. |
| Image | Nano Banana 2 Lite | Faster, simpler variant. A flat 8 credits per image at every resolution. Start here to test. |
| Image | GPT Image 2 | The lowest-cost image model here. About 3 credits per 1K image, 6 at 2K, 12 at 4K. |
| Image | Seedream 5.0 Lite | Flat pricing — about 8 credits per image whether you generate or edit. |
Other ways to try a look before you commit to it.
Two years of growing it out, answered in a few seconds. Same face, same photo, new length.
A real edit made with this tool — drag your own photo in on the left, the prompt is already written, then press Generate.
