Official EyeSift toolkit
EyeSift AI Detector & Official Free Tools
Use the official EyeSift AI detector toolkit for AI text detection, image analysis, video checks, audio detection, plagiarism review, AI detector appeal letters, grammar, spell checking, paraphrasing, summarizing, readability, tone, keyword density, word counts, text cleanup, PDF extraction, and text to speech. No signup required for the core browser-based checks.
Best EyeSift Tool for Each Content Type
If you searched for EyeSift, this is the official tool index. Start with the content type you need to check, then use the supporting writing tools to inspect the exact issue flagged by the detector.
AI Detection
AI Text Detector
Check AI-writing risk with confidence, short-sample warnings, and human-writing signals.
AI Image Detector
Screen images with EXIF, C2PA marker, compression, dimension, and pixel-pattern checks.
AI Video Detector
Screen videos locally with C2PA markers, duration, resolution, bitrate, and generation-risk signals.
AI Audio Detector
Screen audio locally with waveform energy, silence, bitrate, and synthetic-voice risk signals.
Plagiarism Checker
Check originality signals, repeated passages, exact-match source searches, and two-text similarity.
AI Detector Appeal Letter
Build a false-positive evidence packet and human-review request for Turnitin, GPTZero, or school AI flags.
Writing Tools
Grammar Checker
Free online grammar checker with no signup for spelling, punctuation, repeated words, and common writing mistakes.
Spell Checker
Free browser-based spell checker for typos, repeated words, spacing, and common confused-word pairs.
Paraphraser
Rewrite text in different styles while keeping the original meaning intact.
Summarizer
Condense long articles, papers, and documents into concise summaries automatically.
Readability Checker
Score text with Flesch-Kincaid, Gunning Fog, SMOG, and 4 more readability formulas.
Tone Analyzer
Analyze the emotional tone and sentiment of your writing with detailed breakdowns.
Keyword Density
Analyze keyword frequency and density to optimize your content for SEO.
Text Utilities
Word Counter
Count words, sentences, paragraphs, reading time, unique words, and long sentences.
Character Counter
Count characters with spaces, characters without spaces, words, sentences, and reading time.
Sentence Counter
Count sentences and find long sentences that may need editing.
Case Converter
Convert text to uppercase, lowercase, title case, sentence case, snake_case, kebab-case, and camelCase.
Text Compare
Compare two drafts for similarity, word counts, character counts, and unique terms.
Remove Duplicates
Remove repeated lines from lists, URLs, keywords, notes, and copied text.
Lorem Ipsum Generator
Generate clean placeholder paragraphs for wireframes, CMS testing, and layout QA.
How EyeSift AI Detection Works
EyeSift groups AI detection, writing analysis, and utility tools into one free browser-based suite. Detection tools use multiple signals such as statistical patterns, linguistic structure, metadata, and file-level indicators where available. Results should be interpreted as screening signals, not absolute proof. For use-case specific guidance, start with the AI detector guide hub, which organizes checks by industry, AI model, and content type.
Methodology & Detection Approach
- Text signals: perplexity, burstiness, repetition, sentence variation, and other stylometric patterns.
- Visual and file signals: image metadata, C2PA / Content Credentials markers, compression artifacts, file headers, and visible generation artifacts where available.
- Audio and video signals: local waveform, bitrate, duration, resolution, aspect-ratio, C2PA marker, and metadata cues where the browser can read them.
- Writing quality signals: grammar, readability, tone, keyword density, plagiarism risk, and document conversion utilities.
- Human review guidance: outputs are designed to support judgment, not replace it in academic, hiring, legal, or editorial decisions.
Authoritative Research & Standards
- NIST Multimodal Information Group — federal AI detection research
- C2PA Content Credentials Standard — industry standard for content provenance
- FTC AI Claims Guidance — consumer protection requirements
- DHS Science & Technology — Synthetic Media — federal synthetic content research
- U.S. AI.gov Initiative — federal AI policy hub
- arXiv — Computational Linguistics Research — peer-reviewed detection papers
Detection Disclaimer: No AI detector is 100% accurate. Results should be used as supporting evidence, not sole determination. Edge cases (mixed human-AI content, paraphrased AI text, novel models) can produce false positives or negatives. Use multiple tools and human judgment for high-stakes decisions like academic integrity or hiring.
Reviewed by Brazora Monk · Last updated 2026 · Detection methods continuously updated as generative AI evolves
Which EyeSift Tool Should You Use?
Start with the tool that matches the format you need to check. AI detection is strongest when the tool can inspect the right signals for the content type rather than forcing everything through a text-only workflow.
| Need | Best EyeSift Tool | What It Checks |
|---|---|---|
| Check an essay, article, email, or resume | AI Text Detector | Text statistics, repetition, sentence variation, and AI-writing patterns |
| Respond to an AI detector false positive | AI Detector Appeal Letter | Evidence checklist, readiness score, and editable human-review request |
| Check an image or AI art | AI Image Detector | EXIF, C2PA markers, compression clues, dimensions, and visual artifacts |
| Check a voice clip or synthetic audio | AI Audio Detector | Waveform energy, silence ratio, bitrate, and synthetic voice indicators |
| Check a video or deepfake-style clip | AI Video Detector | Duration, dimensions, bitrate, C2PA markers, aspect ratio, and generation-risk cues |
| Improve writing quality | Free Grammar Checker | No-signup grammar, spelling, punctuation, repeated-word, and confused-word checks |
| Check typos quickly | Free Spell Checker | Browser-based typo, spacing, repeated-word, and confused-word checks |
| Prepare SEO or editorial copy | Keyword Density | Keyword frequency, overuse risk, and topical focus checks |
Mixed Human + AI Content
The hardest case is mixed content: human writing that has been rewritten, expanded, or polished by AI. Treat detector output as a risk signal and inspect the highest-risk sections manually. For academic integrity, hiring, legal, or disciplinary decisions, do not rely on a single detector result as the only evidence.
Watermarks and Content Credentials
Some AI systems and media tools support watermarking or provenance standards such as C2PA Content Credentials and Google DeepMind's SynthID. Coverage is still uneven, so EyeSift treats metadata and provenance as useful evidence when present, not as a guarantee when absent.
Accuracy note: AI detection changes as generation models, editing workflows, and watermark standards evolve. Use EyeSift results to prioritize review and combine them with human judgment for high-stakes cases.