Text Watermark Embedding Tool

Professional text copyright protection tool with watermark embedding and extraction verification, multiple embedding methods, custom watermark information, and batch processing.

Bug report

Browser execution mode: Your data is processed in your browser and is not uploaded to the server.

Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

Return to old version

Set options before processing Choose Embed or Extract first, then enter content and watermark settings. Batch files show only the first 20, but processing covers all selected files.

Local processing / Batch ZIP

Select mode and input content

Text mode is for quick tasks. File mode is for batch processing text documents such as TXT, MD, CSV, JSON, XML, HTML, and DOCX.

Current: Embed watermark

Operation mode Controls the next form

Embed watermark Write copyright, document ID, time, and more into text. Extract and verify Read and verify watermark info from watermarked text.

Processing method Switch anytime

Text mode Type, paste, and copy results directly. File mode Read files in batches and download results as a ZIP.

Original text

Characters: 0

Select source files Old DOC files won't be written directly. Save as DOCX or TXT instead.

If multiple files are selected, only the first 20 are shown. Processing and ZIP download include all supported files.

Configure watermark and security settings

Enter copyright info when embedding. When extracting, you can enter a password and auto-detect multiple watermark encodings.

Save common settings first

Watermark info

Author/Organization

Document ID

Contact info

Custom content

Embedding method Auto-detected on extraction

Encoding method

Embedding position

Strength settings Control redundancy and spacing

Repeat count

Interval characters

Random offset

Security and verification Password is only used for local encryption this time

Include timestampRecords when the watermark was generated for traceability. Include content hashChecks whether extracted text matches the embedded text. Enhanced interference resistanceKeep redundancy strategy tips; use with repeat count to improve readability. Enable password protectionEnter the same password to extract.

Watermark Password

Process & Download Results

Review the summary, then start processing. In text mode, you can copy and download results. In file mode, all successful results are packaged as a ZIP.

Pending

Processing Summary

Preparing

Check your input and settings, then click the process button.

Statistics Auto-updates after processing

Processed0

Succeeded0

Watermark Characters0

Time Used0ms

Results

Original/Input Content

Output Content

Watermark Details

No results yet

File Processing Results

Instructions

Software Usage Instructions

Select an operation mode: Choose “Embed Watermark” to write copyright information into the text; choose “Extract & Verify” to read the copyright marker, document ID, time, and hash information from watermarked text.
Select a processing method: Text mode is suitable for directly pasting content for processing; file mode is suitable for batch processing text-based documents such as TXT, MD, CSV, JSON, HTML, XML, and DOCX.
Fill in watermark information: In embed mode, enter the author or organization name, copyright year, document ID, contact information, and custom notes. You can include a timestamp and content hash as needed.
Set the embedding method:
- Zero-width invisible characters: Suitable for general text and does not visually change the appearance of the main text.
- Whitespace character encoding: Stores watermark information using spaces and tabs, suitable for plain text scenarios.
- HTML/XML source comments: Suitable for source-code text and helps preserve the structure.
- Visible copyright footnote: Suitable for content that needs to clearly display a copyright marker.
Configure security options: You can enable password protection and adjust the embedding position, repetition count, interval characters, and random offset to balance concealment, size, and extractability.
Start processing: After entering the “Processing Results” page, click the processing button. In text mode, you can copy or download the result; in file mode, all selected files will be processed.
Download results: After batch processing is complete, click “Download All Results ZIP”. Output files will retain their original file names as much as possible, and numbers will be appended automatically to distinguish duplicate names.

FAQ

A: They are suitable for document copyright marking, content distribution traceability, internal document tracking, draft version identification, contract or proposal delivery records, and similar scenarios. Using the author, document ID, timestamp, and content hash can help determine the source and version information of the text.

A: They usually do not change the visible content of the main text. Zero-width characters do not occupy display width, making them suitable for hiding copyright information in ordinary text. However, different editors, typesetting software, or cleaning tools may filter out these characters, so it is recommended to keep an original backup for important content.

A: The repeat count affects how extractable the watermark is and the size of the text. With a lower count, the text is more lightweight; with a higher count, the watermark information may still be readable after copying, excerpting, or minor editing. You can adjust it based on the importance and length of the document.

A: After password protection is enabled, the watermark content is stored in encrypted form. During extraction, you need to enter the same password to read information such as the author, document ID, and contact details. Please keep the password safe; if it is lost, the encrypted watermark content cannot be restored.

A: The content hash is used to record the text digest at the time the watermark is embedded. If hash verification passes during extraction, it means the current text matches the main content from when it was embedded; if it does not pass, it may indicate that the text has been edited, deleted, modified, or cleaned of formatting.

A: When embedding watermarks, the original file names are kept as much as possible for easy replacement and archiving; if duplicate file names are found in the archive, numbers will be appended to the file names to distinguish them. During extraction and verification, corresponding watermark information JSON files will be generated.

A: DOCX supports reading and writing text watermarks; legacy DOC is a binary format and is not suitable for direct rewriting. It is recommended to save it as DOCX or TXT first before processing to avoid damaging the document structure.