# Zubtitle > Zubtitle is a browser-based video editing tool that helps content creators, businesses, and agencies add captions and subtitles to videos, then optimize them for social media. It uses AI to automatically transcribe speech and generate timed captions, and includes tools for trimming, resizing, branding, and repurposing video content across platforms. Zubtitle is designed for people who create video content for social media but don't have the time, budget, or expertise to use professional editing software. The typical user is a content creator, small business owner, marketer, or agency that needs to produce branded, captioned video quickly. The product is entirely cloud-based — there is nothing to install. Users upload a video, and Zubtitle handles transcription, captioning, and editing in the browser. Finished videos can be downloaded and shared on any platform. Zubtitle supports .mp4, .mov, and .m4v files up to 1 GB, with a maximum duration of 20 minutes. Auto-captioning supports over 60 spoken languages. Users can also download transcription files as .txt or .srt. ## Video Editing Features - [Video Captions](https://zubtitle.com/features/video-captions): AI-powered automatic transcription that generates timed captions burned directly into the video. Supports 60+ languages. Users can edit caption text, timing, fonts, colors, and positioning. - [Caption Animations](https://zubtitle.com/features/animated-captions): Animated caption styles including word-by-word highlighting that increase viewer engagement and watch time on social media. - [Style Templates](https://zubtitle.com/features/video-templates): Users can save branded presets with their fonts, colors, and layout settings, then apply them to future videos with one click for consistent branding. - [Resize and Crop](https://zubtitle.com/features/resize-crop-video): One-click resizing to switch between landscape (16:9), square (1:1), and vertical (9:16) aspect ratios for different social media platforms. - [Video Trimmer](https://zubtitle.com/features/online-video-trimmer): Trim videos to isolate the most relevant or engaging portion before editing. - [Video Headlines](https://zubtitle.com/features/add-title-to-video): Add text headlines to the top of videos to grab attention in social feeds. Supports custom fonts, colors, and positioning. - [Logo and Watermark](https://zubtitle.com/features/add-logo-watermark-to-video): Drag-and-drop tool to add a custom logo or watermark anywhere on the video. - [Progress Bars](https://zubtitle.com/features/add-progress-bar-to-video): Add branded, animated progress bars to videos to increase viewer retention by showing how much of the video remains. ## AI Content Generation Tools Zubtitle includes AI tools that analyze your video's transcription and automatically generate text content you can use alongside the video on social media. - [Social Media Post Generator](https://zubtitle.com/ai/social-media-post-generator): Converts video content into ready-to-use social media post text using AI. - [Video Title Generator](https://zubtitle.com/ai/video-title-generator): Generates headline and title suggestions based on the video's content. - [Hashtag Generator](https://zubtitle.com/ai/hashtag-generator): Analyzes the video and suggests relevant hashtags for social media distribution. - [YouTube Description Generator](https://zubtitle.com/ai/youtube-description-generator): Creates YouTube video descriptions or content summaries from the video transcription. - [YouTube Timestamp Generator](https://zubtitle.com/ai/youtube-timestamp-generator): Generates timestamped chapter markers for YouTube videos based on topic changes in the content. ## Platform-Specific Video Creation Zubtitle helps users create videos optimized for specific social media platforms, with the correct aspect ratios, formatting, and best practices for each. - [Instagram Videos](https://zubtitle.com/social-media/create-videos-for-instagram-online): Create and optimize videos for Instagram posts, Stories, and Reels. - [TikTok Videos](https://zubtitle.com/social-media/create-videos-for-tiktok-online): Create and optimize vertical videos for TikTok. - [LinkedIn Videos](https://zubtitle.com/social-media/create-videos-for-linkedin-online): Create and optimize professional video content for LinkedIn. - [Facebook Videos](https://zubtitle.com/social-media/create-videos-for-facebook-online): Create and optimize videos for Facebook posts and Reels. - [Twitter/X Videos](https://zubtitle.com/social-media/create-videos-for-twitter-online): Create and optimize videos for Twitter/X posts. ## Creator-Specific Guides - [Add Subtitles to YouTube Shorts](https://zubtitle.com/creators/add-subtitles-to-youtube-shorts): How to caption and optimize YouTube Shorts with Zubtitle. - [Add Subtitles to Instagram Reels](https://zubtitle.com/creators/add-subtitles-to-instagram-reels): How to caption and optimize Instagram Reels with Zubtitle. - [Add Subtitles to TikTok Videos](https://zubtitle.com/creators/add-subtitles-to-tiktok): How to caption and optimize TikTok videos with Zubtitle. - [Add Subtitles to Facebook Reels](https://zubtitle.com/creators/add-subtitles-to-facebook-reels): How to caption and optimize Facebook Reels with Zubtitle. - [Add Subtitles to Pinterest Videos](https://zubtitle.com/creators/add-subtitles-to-pinterest-videos): How to caption and optimize Pinterest video pins with Zubtitle. - [Add Subtitles to YouTube Videos](https://zubtitle.com/creators/add-subtitles-to-youtube-videos): How to caption and optimize standard YouTube videos with Zubtitle. ## Use Cases by Industry - [SaaS Companies](https://zubtitle.com/business/saas-videos): Video editing for SaaS marketing teams creating product demos, tutorials, and social content. - [Startups](https://zubtitle.com/business/startup-videos): Affordable video content creation for startup growth and marketing. - [Consulting Firms](https://zubtitle.com/business/consulting-videos): Video marketing for consultants and professional services. - [Insurance Companies](https://zubtitle.com/business/insurance-videos): Video content creation for insurance marketing and client communication. - [Law Firms](https://zubtitle.com/business/law-firm-videos): Video marketing for legal practices. - [Life Coaches](https://zubtitle.com/business/life-coaching-videos): Video content for coaching businesses and personal brands. - [Real Estate](https://zubtitle.com/create-real-estate-videos): Video creation for real estate listings and agent marketing. ## Use Cases by Agency Type - [Video Editing Agencies](https://zubtitle.com/agencies/video-editing-agency): Scale video production for clients without hiring dedicated editors. - [Digital Marketing Agencies](https://zubtitle.com/agencies/digital-marketing-agency): Create branded video content at scale for marketing clients. - [Social Media Agencies](https://zubtitle.com/agencies/social-media-agency): Produce platform-optimized social videos efficiently for multiple clients. - [Video Production Agencies](https://zubtitle.com/agencies/video-production-agency): Repurpose long-form video into short-form social content for clients. ## Key Pages - [Online Video Editor](https://zubtitle.com/online-video-editor): Overview of Zubtitle's browser-based video editing tool and all included features. - [Add Subtitles to Videos](https://zubtitle.com/add-subtitles-to-videos): Detailed explanation of Zubtitle's core auto-captioning and subtitling capabilities. - [Subtitles in Foreign Languages](https://zubtitle.com/subtitles-in-foreign-languages): Information on Zubtitle's support for automatic subtitling in 60+ languages. - [Pricing](https://zubtitle.com/pricing): Plans and pricing information. Zubtitle offers a free trial with video credits, plus paid subscription plans. - [Blog](https://zubtitle.com/blog): Tips, tutorials, social media video strategies, and product updates. ## Optional - [Sign Up](https://dashboard.zubtitle.com/signup): Create a free Zubtitle account. - [Log In](https://dashboard.zubtitle.com/signin): Sign in to an existing Zubtitle account.