• Visual Moderation
    • Overview
    • Nudity & Suggestive
    • Gore & Disgusting
    • Weapons
    • Violence
    • Recreational & Medical Drugs
    • Alcohol
    • Hate & Offensive
    • Gambling
    • Smoking & Tobacco
    • Money & Cash
    • Self-harm
    • Destruction & Fires
    • Military scenes
    • Religious Content
  • OCR & QR Moderation
    • Text Moderation in Images/Videos
    • Embedded Text Detection
    • QR Code Moderation
    • URL/Link Moderation
  • Text Moderation
    • Introduction
    • Categories
    • Rule-based Moderation
    • Text Classification
    • Custom lists
  • Audio Moderation
    • AI Image Detection
      • Deepfake Detection
        • AI Video Detection
          • AI Speech Detection
            • AI Music Detection
              • Face Analysis
                • Age Estimation
                  • In-scene Presence
                    • People Counting
                      • Face Liveness Detection
                        • Image Custom Search
                          • Near-Duplicate Detection
                          • Disallow lists
                          • Spam prevention
                        • Video Custom Search
                          • Near-Duplicate Detection
                          • Disallow lists
                        • OCR
                          • Image Type
                            • Image Quality Detection
                              • Image Recapture Detection
                                • Image Properties
                                  • Color Detection
                                    • Image APIs
                                      • Introduction
                                      • Quick-start
                                      • Workflows
                                      • Batch Processing
                                      • Feedback API
                                    • Video APIs
                                      • Introduction
                                      • Stored video analysis
                                      • Live stream analysis
                                      • Receive Callbacks
                                      • Callback Verification & Signature
                                      • Interact with Jobs
                                      • Workflows
                                      • Upload API
                                    • Text APIs
                                      • API error codes
                                        • FAQ
                                          • Why Sightengine
                                          • Basics
                                          • Dashboard & Workflows
                                          • General Moderation
                                          • Image Moderation
                                          • Video & Stream Moderation
                                          • Visual Models
                                          • AI-Generated Content
                                          • Text Moderation
                                          • Plans & Subscriptions
                                          • Security & Compliance
                                        • Changelog
                                          • Demo
                                          • Pricing
                                          • Contact
                                          SIGN UPLOG IN
                                          • 🛡️Moderation
                                          • Image Moderation120+ moderation classes for your images.
                                          • Video ModerationModerate and filter videos and live streams.
                                          • OCR & QR ModerationModerate text and QR codes present in images and videos.
                                          • Text ModerationDetect and filter unwanted text-based content.
                                          • Audio ModerationTranscribe and detect profanity in audio.
                                          • ✓AI Content Detection
                                          • AI Image DetectionDetect AI-generated images.
                                          • Deepfake DetectionIdentify face swaps and AI manipulation.
                                          • AI Video DetectionSpot AI-generated video content.
                                          • AI Speech DetectionDetect AI-generated speech.
                                          • AI Music DetectionDetect AI-generated music.
                                          • 🔍Visual Search
                                          • Image & Video SearchFind duplicates and similar content.
                                          • 🧑People & Identity
                                          • Profile image validationValidate images based on face visibility, quality, filters and more.
                                          • Age group estimationImplement age group verifications.
                                          • Face Liveness DetectionDetect spoofing attempts and presentation attacks.
                                          • 📊Image Analysis & OCR
                                          • OCRExtract text from images and videos at scale.
                                          • Image QualityAssess technical and aesthetical quality.
                                          • API DocsLearn every endpoint and model capability.
                                          • Knowledge CenterGuides and trust & safety best practices.
                                          Sightengine
                                          • Products
                                            🛡️ Moderation
                                            • Image Moderation
                                              120+ moderation classes for your images.
                                            • Video Moderation
                                              Moderate and filter videos and live streams.
                                            • OCR & QR Moderation
                                              Moderate text and QR codes present in images & videos.
                                            • Text Moderation
                                              Detect and filter unwanted text-based content.
                                            • Audio Moderation
                                              Transcribe and detect profanity in audio.
                                            ✓ AI Content Detection
                                            • AI Image Detection
                                              Detect AI-generated images.
                                            • Deepfake Detection
                                              Identify face swaps and AI manipulation.
                                            • AI Video Detection
                                              Spot AI-generated video content.
                                            • AI Voice Detection New
                                              Detect AI-generated speech.
                                            • AI Music Detection
                                              Detect AI-generated music.
                                            🔍 Visual Search
                                            • Image & Video Search
                                              Find duplicates and similar content.
                                            🧑 People & Identity
                                            • Profile image validation
                                              Validate images based on face visibility, quality, filters and more.
                                            • Age group estimation
                                              Implement age group verifications.
                                            • Face Liveness Detection New
                                              Detect spoofing attempts and presentation attacks.
                                            📊 Image Analysis & OCR
                                            • OCR
                                              Extract text from images and videos at scale.
                                            • Image Quality
                                              Assess technical and aesthetical quality.
                                            Explore all models & documentationGet API Keys
                                          • Demo
                                          • Pricing
                                          • Resources
                                            • Knowledge Center
                                              Guides and resources to Content Moderation
                                            • API Documentation
                                              Learn to use the API and discover all features
                                          • Login
                                          • SIGN UP
                                          Menu

                                          What is the maximum text length?

                                          When using Text Classification models, the texts submitted to the API can be up to 10000 characters long.

                                          Under the Rule-based pattern-matching algorithms, texts can be up to 10000 characters long.

                                          When using Username moderation, usernames can be up to 128 characters long.

                                          If you need to submit texts or usernames that are longer than the above limits, please reach out.

                                          Other frequent questions

                                          • How does text moderation work?
                                          • How do text classification models work?
                                          • How do rule-based pattern-matching algorithms work?
                                          • How does Sightengine's text moderation differ from keyword filtering? How do you prevent users from circumventing word filters?
                                          • Is it possible to customize the Text Moderation API to my needs?
                                          • What languages does text moderation work with?
                                          • Can you automatically detect the language of the text I want to moderate?
                                          • How does pricing for text moderation work?
                                          Sightengine © 2026FAQSupport