Kling 4.0 is an online video generation service based on Kuaishou's latest AI video model, Kling 4.0, and the website kling4.co.kr provides a Korean-language interface, allowing AI video creation directly in the browser.
Purpose: By entering text prompts or uploading images, users can generate videos that include camera movement, lighting, and character motion without the need for filming equipment or editing software. It is suitable for a wide range of needs, from simple ideas to longer video clips.
Main capabilities:
- Two generation methods: text-to-video and image-to-video.
- Standard mode up to 30 seconds, 1080p; long-video mode up to 2 minutes. Kling 4.0 Flash supports 3-20 seconds at 720p, with faster and lighter generation.
- Supports up to 10 keyframes to design the scene flow.
- Supports up to 15 references (a mix of images, videos, and Elements), as well as up to 3 voice references.
- Simultaneously generates sound effects that match the video.
- Outputs MP4 files, and generation records are saved automatically for viewing and downloading at any time.
- Credits are automatically refunded if generation fails.
- The same account and credits can be used to switch between Kling 4.0 and Kling 4.0 Flash, and users can also compare various AI video models such as Kling 3.0, Seedance, Wan, and MiniMax.
- The required credits are displayed before generation.
How to use:
- In the video model, select Kling 4.0 or Kling 4.0 Flash and describe the scene you want to generate; when using images, upload keyframe images and references.
- Choose the length and resolution: standard mode 3-30 seconds, long-video mode up to 2 minutes, with 720p or 1080p available, then click generate. The required credits are shown in advance before generation.
- Preview the generated video and download it as an MP4 file; the result is saved in the generation records.
Use cases: Suitable for users who need to conveniently create AI videos in a Korean-language environment, including individual creators, professional creators, and studios. Free credits can be used for an initial trial, after which credits can be purchased in Korean won as needed. It supports domestic cards, KakaoPay, Samsung Pay, Naver Pay, as well as payment methods such as Visa, Mastercard, Amex, JCB, Apple Pay, and Google Pay.
Limitations and notes:
- Standard mode 3-30 seconds, 720p or 1080p; long-video mode from 3 seconds up to a maximum of 2 minutes; Kling 4.0 Flash 3-20 seconds, 720p.
- Generation limits depend on the credit balance;Free account registration grants credits; paid plans recharge credits monthly, and with most plans unused credits can be carried over.
- Uploaded references and generated results are kept private within the account only and are not used for model training.
- Subscription cancellation is handled through the Stripe customer portal under "구독 관리"; automatic renewal stops after the end of the current billing cycle. For refunds, contact support@kling4.co.kr.
- Paid plans are annual: ₩268,800 per year as a one-time payment gets 10,148 credits (Starter); ₩503,160 per year as a one-time payment gets 34,749 credits (Creator/Expert, priority processing, up to 50 multi-references); ₩2,511,600 per year as a one-time payment gets 192,174 credits (Studio/Heavy User, fastest generation, up to 50 multi-references).
- Credit-saving tip: first use 클링 4.0 Flash or 720p and a short duration to test composition and motion, then once satisfied generate with 클링 4.0 1080p.
- For prompts, it is recommended to describe specifically in the order of subject, action, camera movement, lighting, and atmosphere.
- Payment security: Stripe secure payments, SSL encryption, PCI DSS compliance, 256-bit encryption.
- Registration does not require a credit card to claim free credits, and generated videos can be used for commercial purposes.
Some information (such as specific refund conditions, the number of free credits, etc.) is not yet provided in the materials.
