What is VideoComposer?

VideoComposer is a free online video composer that lets you merge, trim, convert, and watermark videos directly in your browser — no downloads or signup required. It also provides a REST API so developers can automate video composition at scale.

What is a video composition API?

A video composition API lets developers programmatically merge, trim, overlay, and convert video files via HTTP requests — without a desktop editor or manual steps. VideoComposer provides a REST API that handles all core video composition operations, returning processed files asynchronously.

How does VideoComposer's API work?

Send a POST request to the relevant endpoint (merge, trim, convert, or watermark) with your video file URLs and parameters. The API queues the job and returns a job ID. Poll the status endpoint or configure a webhook to retrieve the finished video URL when processing completes.

What video formats does VideoComposer support?

Browser tools accept MP4 and WebM inputs. The converter outputs MP4, WebM, or GIF. The compose tool supports MP3 audio and SRT/VTT subtitle files. Use the /video/validate API endpoint to confirm format compatibility before submitting a job.

Is VideoComposer free to use?

Yes. VideoComposer is free for browser-based tools with no account required. Anonymous users can run up to 5 jobs per 24 hours. Paid credits-based plans are available for higher volume and full API access — no mandatory monthly minimum.

How is VideoComposer different from FFmpeg?

FFmpeg is a powerful command-line tool that requires installation, technical expertise, and manual scripting. VideoComposer wraps the same FFmpeg-based processing in a browser UI and a clean REST API — no server setup, no CLI knowledge needed. Use VideoComposer to get FFmpeg-quality results without the complexity.

How does credit-based pricing work?

Each credit equals one second of processing time (rounded up). Jobs deduct credits based on actual processing time. Typical usage in the docs: trim ~10 credits/min, convert ~20 credits/min, compose ~15 credits/video, overlay ~15 credits/min.

Do you support webhooks?

Yes. You can configure webhooks per API key to receive job completion callbacks. If you prefer, you can also poll job status; browser tools can send email notifications when a job finishes.

Professional Video Processing APILearn more

Transform Your Videos
With Powerful APIs

Trim, convert, add subtitles, overlay watermarks, and more. Build amazing video experiences with our simple yet powerful API.

Developer First

RESTful API Endpoints

Clean, predictable endpoints that follow REST best practices. Powered by an FFmpeg API layer for async video processing, with JSON responses and helpful error messages.

Available Endpoints

POST/video/trim

Trim videos to specific start and end times

POST/video/convert

Convert between MP4, WebM, and GIF formats

POST/video/compose

Combine multiple videos, add audio or subtitles

POST/video/overlay

Add watermarks or text overlays

POST/video/thumbnail

Generate thumbnails, sprites, or animated previews

GET/video/probe

Get detailed video metadata

Example Response

200 OK

{
  "jobId": "550e8400-e29b-41d4-a716-446655440000",
  "status": "queued",
  "message": "Your video processing job has been queued.",
  "estimatedTime": 30,
  "creditsUsed": 15
}

View Full Documentation

Professional Video Processing APILearn more

Transform Your Videos
With Powerful APIs

Trim, convert, add subtitles, overlay watermarks, and more. Build amazing video experiences with our simple yet powerful API.

Popular tools

Video tools people search for most

Use browser tools for quick edits or link into the API for automation. Each tool maps directly to its keyword intent.

MP4 to GIF

mp4 to gif

Convert MP4 clips into shareable GIFs for demos.

Video to GIF

video to gif

Turn any supported video into a loopable GIF.

Video Converter

video converter

Convert video online to MP4, WebM, or GIF.

Video Trimmer

video trimmer

Trim a video online with simple start/end times.

Video Cutter

video cutter

Cut video clips quickly for highlights and reels.

Merge Videos

merge videos

Merge videos with optional audio and subtitles.

Simple Integration

Get Started in Minutes

Our API is designed to be simple and intuitive. Here's how it works:

1. Get Your API Key

2. Send Your Request

Make a simple POST request with your video URL and parameters.

3. Get Your Result

Receive the processed video URL when the job completes.

What else you get:

Comprehensive documentation

SDK libraries for popular languages

Webhook notifications

Batch processing support

Priority support

No rate limits

Everything you need

Professional Video Processing Made Simple

Built for developers who need reliable, fast, and scalable video processing without the complexity.

Lightning Fast Processing: Powered by optimized FFmpeg instances, process videos in seconds not minutes.
Simple REST API: Clean, well-documented REST endpoints that are easy to integrate into any application.
Pay As You Go: Only pay for what you use. No monthly fees, just simple CPU-second based pricing.
Enterprise Security: Your videos are processed securely and deleted immediately after processing.
Rich Format Support: Support for all major video formats including MP4, WebM, MOV, AVI, and more.
Scale Infinitely: Built on cloud infrastructure that scales automatically with your needs.

Trusted by developers worldwide

Videos processed: 10M+
API uptime: 99.9%
Happy developers: 5,000+

Use cases

Video workflows teams run every day

Build with the browser tools or automate everything with the API. Each use case ties directly to a tool or endpoint.

Product demos and onboarding

Trim longer recordings into crisp walkthroughs, then export MP4 or GIF clips for documentation and in-app tips.

video trimmermp4 to gif

Customer support and QA

Normalize user uploads to consistent formats and share short clips with support teams for faster debugging.

video convertervideo cutter

Marketing and social content

Create short, loopable assets for social posts, product launches, and ad creative with GIF or MP4 outputs.

video to gifvideo converter

Education and training

Merge lesson clips, add background audio, and include subtitles for accessible training material.

merge videosadd subtitles

Brand protection

Apply logos or text watermarks so assets stay branded across partners and distribution channels.

add watermark to video

Developer automation

Trigger async jobs from your backend, then retrieve outputs with webhooks and job polling.

video processing apiffmpeg api

Build your workflow

Shorten, convert, merge, and automate

Start in the browser, then switch to the video processing API when you need scale. Each workflow below maps to real tasks teams run every day.

API ready

Every tool is backed by an FFmpeg API layer with async jobs and webhooks, so you can automate conversions, trims, and overlays without blocking users.

Developer overview

Convert and GIF workflows

Use the video converter to export MP4 or WebM, or spin up MP4 to GIF and video to GIF outputs for quick demos.

video convertermp4 to gifvideo to gif

Try this workflow

Trim and cut precision

Trim video online for fast edits, or use the video cutter and MP4 cutter when you need tighter clip control.

video trimmervideo cuttermp4 cutter

Try this workflow

Merge and watermark

Merge videos into a single output, then add watermark to video exports for branded delivery.

merge videosadd watermark to video

Try this workflow

Developer First

RESTful API Endpoints

Clean, predictable endpoints that follow REST best practices. Powered by an FFmpeg API layer for async video processing, with JSON responses and helpful error messages.

Available Endpoints

POST/video/trim

Trim videos to specific start and end times

POST/video/convert

Convert between MP4, WebM, and GIF formats

POST/video/compose

Combine multiple videos, add audio or subtitles

POST/video/overlay

Add watermarks or text overlays

POST/video/thumbnail

Generate thumbnails, sprites, or animated previews

GET/video/probe

Get detailed video metadata

Example Response

200 OK

{
  "jobId": "550e8400-e29b-41d4-a716-446655440000",
  "status": "queued",
  "message": "Your video processing job has been queued.",
  "estimatedTime": 30,
  "creditsUsed": 15
}

View Full Documentation

Try It Now - No Sign Up Required

Test our video processing tools instantly. Upload your video and see the magic happen.

Trim Videos

Cut your videos to the perfect length

Convert Formats

Convert between MP4, WebM, GIF and more

Compose Videos

Combine multiple clips into one

Add Watermarks

Protect your content with watermarks

Add Subtitles

Make your videos accessible

Add Audio

Mix in background music or voiceovers

Limits and policies

Know the boundaries before you ship

Video processing workloads vary widely. These guardrails keep the platform stable while you scale.

Plan-based usage limits

Credits and plan tiers determine processing time, concurrency, and maximum upload sizes. Check your dashboard for the latest limits.

Anonymous usage caps

Browser tools include daily limits to prevent abuse. Create an account to unlock higher limits and API access.

Supported formats

Inputs must be in supported video, audio, image, or subtitle formats. Use the tools to validate before sending jobs.

Async processing windows

Longer videos take more time. Use webhooks or job polling to keep your app responsive.

Fair-use rate limits

API endpoints enforce fair-use rate limits. If you need higher throughput, reach out to the team.

Need specifics?Review API detailsorcompare plansfor full limits.

Frequently Asked Questions

Everything you need to know about VideoComposer

: VideoComposer is a free online video composer that lets you merge, trim, convert, and watermark videos directly in your browser — no downloads or signup required. It also provides a REST API so developers can automate video composition at scale.
: A video composition API lets developers programmatically merge, trim, overlay, and convert video files via HTTP requests — without a desktop editor or manual steps. VideoComposer provides a REST API that handles all core video composition operations, returning processed files asynchronously.
: Send a POST request to the relevant endpoint (merge, trim, convert, or watermark) with your video file URLs and parameters. The API queues the job and returns a job ID. Poll the status endpoint or configure a webhook to retrieve the finished video URL when processing completes.
: Browser tools accept MP4 and WebM inputs. The converter outputs MP4, WebM, or GIF. The compose tool supports MP3 audio and SRT/VTT subtitle files. Use the /video/validate API endpoint to confirm format compatibility before submitting a job.
: Yes. VideoComposer is free for browser-based tools with no account required. Anonymous users can run up to 5 jobs per 24 hours. Paid credits-based plans are available for higher volume and full API access — no mandatory monthly minimum.
: FFmpeg is a powerful command-line tool that requires installation, technical expertise, and manual scripting. VideoComposer wraps the same FFmpeg-based processing in a browser UI and a clean REST API — no server setup, no CLI knowledge needed. Use VideoComposer to get FFmpeg-quality results without the complexity.
: Each credit equals one second of processing time (rounded up). Jobs deduct credits based on actual processing time. Typical usage in the docs: trim ~10 credits/min, convert ~20 credits/min, compose ~15 credits/video, overlay ~15 credits/min.
: Yes. You can configure webhooks per API key to receive job completion callbacks. If you prefer, you can also poll job status; browser tools can send email notifications when a job finishes.

Explore

Everything VideoComposer offers

From quick browser edits to automated API pipelines — find the resource that matches your workflow.

All Video Tools

Browse every free browser-based video tool — merge, trim, cut, convert, watermark, and more.

Explore

Pricing

Free browser tools with no signup. API access from $14.99/month — credits-based, no mandatory monthly minimum.

Explore

Comparisons

Side-by-side comparisons: VideoComposer vs Shotstack, Clideo, and other video platforms.

Explore

Alternatives

Free alternatives to Clideo, Kapwing, and VEED — no watermark, no signup required.

Explore

Use Cases

Practical workflows for social media creators, developers, marketers, and support teams.

Explore

Guides

Step-by-step tutorials for converting, trimming, merging, and watermarking videos online.

Explore

Blog

Articles, tutorials, and API guides for developers building video processing workflows.

Explore

Developer API

REST API for programmatic video processing — async jobs, webhooks, and full format support.

Explore

Ready to Transform Your Videos?

Join thousands of developers using VideoComposer to build amazing video experiences. Start for free and scale when you need it.

Read Documentation

No credit card requiredFree account to get startedCancel anytime

Transform Your VideosWith Powerful APIs

Trim, convert, add subtitles, overlay watermarks, and more. Build amazing video experiences with our simple yet powerful API.

Developer First

Available Endpoints

Example Response

Transform Your VideosWith Powerful APIs

Trim, convert, add subtitles, overlay watermarks, and more. Build amazing video experiences with our simple yet powerful API.

Popular tools

MP4 to GIF

Video to GIF

Video Converter

Video Trimmer

Video Cutter

Merge Videos

Simple Integration

1. Get Your API Key

2. Send Your Request

3. Get Your Result

What else you get:

Everything you need

Trusted by developers worldwide

Use cases

Product demos and onboarding

Customer support and QA

Marketing and social content

Education and training

Brand protection

Developer automation

Build your workflow

Convert and GIF workflows

Trim and cut precision

Merge and watermark

Developer First

Available Endpoints

Example Response

Try It Now - No Sign Up Required

Trim Videos

Convert Formats

Compose Videos

Add Watermarks

Add Subtitles

Add Audio

Limits and policies

Plan-based usage limits

Anonymous usage caps

Supported formats

Async processing windows

Fair-use rate limits

Frequently Asked Questions

Explore

All Video Tools

Pricing

Comparisons

Alternatives

Use Cases

Guides

Blog

Developer API

Ready to Transform Your Videos?

Popular tools

MP4 to GIF

Video to GIF

Video Converter

Video Trimmer

Video Cutter

Merge Videos

Simple Integration

1. Get Your API Key

2. Send Your Request

3. Get Your Result

What else you get:

Everything you need

Trusted by developers worldwide

Use cases

Product demos and onboarding

Customer support and QA

Marketing and social content

Education and training

Brand protection

Developer automation

Transform Your Videos
With Powerful APIs

Transform Your Videos
With Powerful APIs