copainter

What is copainter?

copainter is a web-based AI tool that supports illustration, manga, and anime production through stages such as inking, base coloring, shading, and background creation. It operates via a browser interface without requiring high-performance hardware or local software installation. The vendor states that uploaded images and generated outputs are not used to train its AI models.

What are the features of copainter?

• Line art generation

  Converts rough sketches into refined line art with adjustable fidelity, line thickness, and tapering, plus automatic prompt detection from the input image.
• Coloring

  Applies flat, anime-style, brush, or watercolor rendering to line art and base colors, supporting PSD export with separated layers.
• Layer separation

  Exports colored illustrations as layered PSD files, optionally separating characters and backgrounds into distinct layers for further editing.
• Image transformation

  Modifies expressions, poses, outfits, or backgrounds using text prompts and selectable conversion or creative models.
• Resolution enhancement

  Upscales illustrations using an illustration-specific model intended to preserve line sharpness and color detail.
• Photo-to-background conversion

  Transforms landscape photographs into illustrated or manga-style background assets while retaining the original composition.

What are the use cases of copainter?

• 3D model reference

  Converts 3D models from software like VRoid into 2D illustrations for character design exploration before applying coloring.
• Restoring corrupted artwork

  Recovers usable line art from low-resolution PDF proofs when original illustration files are damaged.
• Monochrome recoloring

  Colorizes previously published black-and-white sketches or line art for digital remastering.

How to use copainter?

1. Prepare inputs

   Complete the line art and base coloring stages for the illustration.
2. Load assets

   Import the separate line art and base color files into the web interface.
3. Select style

   Choose a coloring option such as watercolor rendering.
4. Add details

   Manually paint over the AI-generated output to finish the piece.

copainter Pricing Information:

• Free

  ¥0 per month; 3 tickets per month plus 10 tickets on initial registration; basic features only; additional ticket purchases are not available.
• Light

  ¥680 per month or ¥567 per month billed annually (¥6,800 per year); 50 tickets per month; basic features; additional ticket purchases allowed; 14-day free trial on first annual subscription.
• Basic

  ¥1,980 per month or ¥1,650 per month billed annually (¥19,800 per year); 300 tickets per month; basic features; additional ticket purchases allowed; 14-day free trial on first annual subscription.
• Pro

  ¥4,800 per month or ¥4,000 per month billed annually (¥48,000 per year); unlimited use for most features, though some functions such as the AI assistant consume tickets from the 300-ticket monthly allocation; additional ticket purchases allowed; 14-day free trial on first annual subscription.
• Enterprise

  Custom pricing for organizations; provides dedicated AI models trained to output requested art styles or characters.
• Tickets across all plans expire 60 days after issuance and renew monthly on the plan registration date. Paid plans auto-renew until canceled. Individual plans target individuals or small businesses with under ¥10 million in annual revenue.