ZeroClaude

Products

AI Detector Find out whether a text was written by ChatGPT, Claude, Gemini or a person.AI Humanizer Rewrite AI-sounding text into natural, human-like writing that keeps your meaning.AI Image Detector Upload an image and check whether it was generated by Midjourney, DALL-E or similar.AI Video Detector Check videos for AI-generated or manipulated frames.AI PPT & PDF Detector Check PowerPoint, PDF and Word files: the text on every page, the pictures and AI traces in the file.Plagiarism Checker Compare your text against web sources to find copied passages.AI Paraphraser Rephrase any text in the tone you need while keeping its meaning.Grammar Checker Fix grammar, spelling and punctuation mistakes in seconds.AI Summarizer Condense long articles into clear summaries or bullet points.AI Translator Accurate, natural translations between the world's major languages.Word Counter Count words, characters, sentences, reading time and keyword density live.Dictionary Look up definitions, synonyms, antonyms and example sentences.AI Email Helper Draft new emails or replies in any tone and language.Citation Generator Create correctly formatted APA, MLA and Chicago citations.Pomodoro Timer Stay focused with work/break cycles and a simple task list.ZeroChat Chat with an AI assistant for writing, study and research.Background Remover Remove image backgrounds automatically.AI Homework Helper Ask any homework question by text, photo, PDF or link and get a step-by-step solution.AI Essay Writer Write structured essays by type, length, level and language, with real citations.PDF Editor Edit, sign, merge, split, compress, convert and protect PDFs in your browser.Daily Brain Games Six daily logic puzzles with hints, timers and a leaderboard.

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PDF Editor›Security›Watermark

Watermark

Insert text or image watermarks into PDF documents

Select PDF file

or drop files here

Your files are processed in your browser and never leave your device.

Options

WatermarkTextImage

TextFontFont sizeColorImage (PNG or JPG)Image size: 40 % of page widthOpacity: 30 %Rotation

Position

Tile across the page

LayerOver the page contentBehind the page content

Pages

✓ Done!

More tools: Security

Protect Secure your file with passwords and access permissions Unlock Unlock PDFs by removing passwords and restrictions Flatten Convert fillable PDFs to read-only and print & scan in a single step

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ZeroClaude

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How detection works

AI detectors

AI detector for theses
AI checker for essays
AI detector for teachers
ChatGPT detector
Claude detector
Gemini detector
DeepSeek detector

Features

AI Detector
AI Humanizer
AI Image Detector
AI Video Detector
AI PPT & PDF Detector
Plagiarism Checker
AI Paraphraser
Grammar Checker
AI Summarizer
AI Translator
Word Counter

Dictionary
AI Email Helper
Citation Generator
Pomodoro Timer
ZeroChat
Background Remover
AI Homework Helper
AI Essay Writer
PDF Editor
Daily Brain Games

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