About Find Duplicate Content
Find Duplicate Content compares uploaded documents and returns similarity percentages so you can spot repeated writing quickly. Writers use it to detect overlap between drafts, students use it to avoid accidental repetition across submissions, and editors use it to audit reused sections before publication.
The tool extracts readable text, normalizes punctuation and casing, then evaluates pairwise overlap. Results show top matches first, with higher percentages signaling likely duplicates that deserve manual review. It is useful for screening large batches where line-by-line reading would take too long.
Treat the percentage as a decision aid, not a legal verdict. Similar language can appear naturally in templates, policy clauses, and technical instructions. Always inspect context, references, and attribution before labeling content as copied.
For best results, upload text-rich files (TXT, MD, CSV, JSON, DOCX, or OCR-friendly PDFs). Image-only pages with poor scan quality may produce weak extraction and under-report similarity.
Check similarity between two documents (or many at once) and get percentage scores plus sample overlapping sentences—ideal before you publish or submit drafts.
Supported formats
This tool accepts PDF, Plain, .Txt,.Md,.Csv,.Json,.Xml,.Log,.Docx. Multiple files are supported when the control allows it—order usually matches page order in the output. Always respect the upload limit shown next to the form before sending large documents.
How to use
- Click Upload and choose your files.
- Set any options shown (compression, mode, ranges, etc.).
- Press Run tool and wait until the progress finishes.
- Download or copy the result from the result panel.
If processing fails, check the upload size limit on the form, try fewer or smaller files, or retry in a fresh tab.
Security & privacy
Files and text you send are processed to produce your result and are not intended for long-term storage on your behalf. Avoid uploading passports, bank details, medical records, or legally sensitive material unless you accept the risks of any online service. For confidential workflows, prefer offline software on a device you control. Read our privacy policy for site-wide practices.