ANDROIDAndroid app
The Android build for outside mainland China is being prepared.
Coming soonWe’ll publish the download here when it opensDOCUMENT TOOLS FOR PEOPLE AND AGENTS · CHAONIUDOC.APP
Free document scans,
for people and agents,
no watermark.
Scan, convert, recognize, edit and sign documents in one app. An open API and a remote MCP server let your agents use the same tools.
Free scans. No watermark on exports.Capture paper documents, straighten and enhance them, then save or share clean files.
Both global builds are still in preparation, so there is no download on this site yet. Developers can already reach the same processing through the open API and MCP, and this page is updated the moment a download opens.
One toolkit, two ways to workWork with documents in the appConnect agents with API or MCPCreate and explore more
01 / AGENT ACCESS
Give your agent
real documents to work with.
Connect document enhancement, PDF tools, audio transcription, video script analysis and flagship image generation through the open API and MCP. Image and video jobs follow the app’s live pricing and billing rules.
- REST API and remote MCP access
- Create keys and view usage inside the app
- The API reference lists the available tools and their prices
An English API reference on chaoniudoc.app is in preparation.
# Create a key in the app: Me → Open API
# Replace the placeholder with your own key
❯ claude mcp add --transport http chaoniu \
https://chaoniudoc.com/mcp \
--header "Authorization: Bearer cn_live_YOUR_KEY"
# Then ask your agent to process a file
❯ claude
> Enhance this document photo with ChaoNiu Doc
The key above is a placeholder. Create your own key in the app.
Document photo → enhancement → agent workflow
Even a skewed document photo can join your agent workflow.
The agent calls enhance_image to detect edges, straighten and enhance the photo. The clearer result can then be read, summarised or filed by a vision model.
02 / DOCUMENTS ARE THE CORE
Capture a document.
Make it the file you need.
Free scans export with no brand watermark. Start from a clear capture, then produce PDF, Word, Excel, JPG, PNG or TXT; signing, stamping and page tidy-up happen in the same place.
03 / IMAGE CREATION · CHAONIU FLAGSHIP MODEL
One prompt.
A world of images.
Describe your image or add reference photos, choose an aspect ratio and generate a high-resolution result in the app.
Text descriptionReference imageSeveral aspect ratiosSave and share
PRODUCT VISUALS
Turn a product idea into a visual ready to present.
Write down the brand, how the product looks and where it is used, then generate packaging, advertising and product shots.
PromptA high-end advertising image for CHAONIU amber serum: the bottle rests on warm sandstone and the sunset side light reveals real glass texture.
PromptKraft paper bags and gift boxes for the CHAONIU bakery brand, with baskets and wheat ears, in a warm bakery advertising scene.
PromptA product image for the CHAONIU clip-on wireless microphone: the compact mic and its charging case, metal details picked out by soft warm light.
TEXT TO IMAGE
A single description can lead to different worlds.
Landscapes, interiors, fairy tales, food — every theme is worth a try.
PromptAt sunrise, golden clouds flow through the cascading valleys and a lit cabin by the lake is reflected in calm water.
PromptAn afternoon Mediterranean reading room: arched walls, olive trees and a linen sofa bathed in light from the windows.
PromptA gentle giant turtle carries a lit little bookshop through the autumn forest; fallen leaves and lanterns make it look like a picture book.
PromptGolden crisp croissants and fresh figs suspended in sunlight, with a linen tablecloth and ceramic plates forming a high-end baking still life.
Reference photo + promptUse a photo of your pet as the reference so its coat and expression carry over. Give it a plaid scarf in a sunny corner cafe, paws on the latte cup, croissants and berries on the table, plants and flowers by the window.
The products shown are fictional creative references, not real products for sale. Results change with the prompt, reference images and settings.
04 / VIDEO SCRIPTS · CREATOR TOOLBOX
Turn spoken video content into a document.
Paste a public video link to extract its spoken script and export it as Word or TXT. AI breaks down the opening, structure and delivery. Links from 1,000+ platforms are supported, subject to successful parsing.
FAQ
What people ask most about free scanning and watermark-free exports
Straight answers about free scanning in ChaoNiu Doc Scanner, the export formats and where you can use it today.
Is there a genuinely free scanner app that exports without a watermark?
Yes. Scanning in ChaoNiu Doc Scanner is free, and the PDFs, Word files and images you export carry no ChaoNiu brand watermark.
How do I scan a paper document to PDF with my phone?
Open ChaoNiu Doc Scanner and photograph the page. It detects the paper edges, straightens a skewed shot and enhances the image, then exports a PDF. You can then organize the pages, add a signature or a stamp, and export the finished file.
Can a scan be converted to Word or Excel?
Yes. After scanning you can export Word (DOCX), Excel (XLSX) and TXT, as well as JPG and PNG. Text extraction (OCR) pulls the text out of the image so you can keep editing and searching it.
How do I download it on Android or iPhone? Where can I use it right now?
Not yet, and we would rather say so plainly. The Android build for outside mainland China is still being prepared and the iPhone app is not on the App Store yet, so there is nothing to download from this site today. Developers can already reach the same processing through the open API and the remote MCP server. The availability section on this page is updated the moment a download opens.
Can I sign and stamp a document in the same place?
Yes. Add a handwritten signature and a stamp right after scanning, reorder the pages, then export the finished PDF — no second tool needed.
Can an AI agent call ChaoNiu capabilities?
Yes. There is a REST API and a remote MCP server at https://chaoniudoc.com/mcp. Scan enhancement, PDF tools, audio transcription, video script analysis and image generation can all be called by an agent. Create a key in the app under “Me → Open API”; see the Open API documentation for integration details.
Availability · CHAONIUDOC.APP
When and where you can get it.
Nothing on this page is a download link yet. It is updated as each route opens.
ANDROID
IPHONEiPhone app
The iPhone version is preparing its official download route.
Coming to the App StoreDownloads will be available here once it opensSupport and policies
Questions, data requests and refunds — start here.