Video Converter

Convert between MP4, WebM, MOV, and more formats instantly. Trim, resize, and adjust quality — all processed privately in your browser. No uploads ever.

100% Free
No Upload Required
MP4 · WebM · MOV · AVI
Trim & Resize
Batch Ready

Drop your video here

or click to browse — MP4, MOV, WebM, AVI, MKV, WMV and more
MP4MOVWebMAVIMKVWMVFLV+More
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Duration: --- Resolution: --- Size: --- Type: ---
How it works: Browser-based conversion uses the MediaRecorder API with Canvas re-encoding. Output is WebM (VP9/VP8) — the most widely supported browser format. For MP4 output, the file is saved as WebM container which most players and platforms accept. True MP4 (H.264) re-muxing requires FFmpeg which runs server-side.
Choose Output Format
WebM
VP9 · Best quality/size
VP8
WebM · Wide support
WebM
Auto codec · Safe
MP4
H.264 · Universal
MKV
WebM stream · HD
AVI
Legacy · Compatible
Advanced Settings
Trim Video (optional)
Format: m:ss.ms  |  Leave blank = no trim
Output Quality High (80%)
Smallest FileBest Quality
Converting video... 0%
Initializing encoder...
Conversion Complete!
Original Size
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Output Size
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Duration
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Output Format
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How It Works

Convert any video to any format in three simple steps.

1

Upload Your Video

Drag and drop or click to browse. Supports MP4, MOV, WebM, AVI, MKV, WMV, FLV and most video formats your browser can decode.

2

Choose Format & Settings

Pick your output format, resolution, frame rate, bitrate, audio settings, and optionally trim the video to a specific start and end time.

3

Convert & Download

Conversion runs fully in your browser using MediaRecorder and Canvas APIs. When done, download your converted file instantly with one click.

Everything You Need

A fully advanced video converter — zero installs, zero uploads.

Multi-Format Conversion

Convert to WebM, VP9, VP8, MP4, MKV, AVI and more. Output format selection changes the file extension and codec used for maximum compatibility.

Video Trimming

Trim your video to any start and end time before converting. Specify times in mm:ss.ms format — perfect for cutting out intros or unwanted sections.

Resolution & Aspect Ratio

Scale to 4K, 1080p, 720p, 480p, 360p or keep original. Change aspect ratio to 16:9, 9:16 (Reels/Shorts), 1:1 (Square), or 4:3.

100% Private

Everything runs in your browser. Your video is never uploaded to any server. HTML5 Canvas + MediaRecorder API does all the work client-side.

Audio Control

Keep original audio or strip it completely for silent video. Audio track is passed through the MediaStream pipeline without re-encoding when possible.

Custom Bitrate & FPS

Set custom bitrate in kbps or choose from presets (High/Medium/Low). Select frame rate from 15fps to 60fps for perfect output for any platform.

Format Compatibility Guide
Format Chrome Firefox Safari Android iOS WhatsApp YouTube
WebM VP9✓✓Limited✓Limited✓✓
WebM VP8✓✓No✓No✓✓
MP4 H.264✓✓✓✓✓✓✓
MKV✓✓Limited✓LimitedNo✓
MOV✓Limited✓Limited✓✓✓

Frequently Asked Questions

Can I convert MP4 to WebM?
Yes. Select your MP4 file, choose WebM VP9 as output format, adjust quality settings if needed, and click Convert Video. The browser re-encodes the video using the Canvas and MediaRecorder APIs.
Why is the output always WebM even when I choose MP4?
Browser-based video encoding only supports WebM natively through the MediaRecorder API. When you choose MP4 or MKV, the video stream is the same but saved with the correct file extension so most players and platforms recognize and play it correctly. True H.264 MP4 encoding requires server-side FFmpeg processing.
Is my video uploaded to a server?
Never. All conversion happens inside your browser using the HTML5 Video element, Canvas API, and MediaRecorder API. Your video file does not leave your device at any point in the process.
How do I trim a video while converting?
Click "Advanced Settings", then enter the Start and End time in the Trim section using mm:ss.ms format (for example, 0:30.000 to start at 30 seconds). Leave End blank to convert until the end of the video.
How long does conversion take?
Conversion happens at approximately real-time speed — a 5-minute video takes roughly 5 minutes to convert. Speed depends on your device's CPU performance. Desktop computers are significantly faster than mobile devices.
What is the best format for sharing on WhatsApp or Instagram?
For WhatsApp, choose MP4 extension with 720p or 480p resolution and Medium bitrate. For Instagram Reels, choose 9:16 aspect ratio, 1080p, and WebM VP9. For YouTube, WebM VP9 at original resolution delivers excellent quality.

Free Online Video Converter — Convert Videos in Your Browser

Our free online video converter lets you convert MP4, MOV, WebM, AVI, MKV and other formats entirely inside your browser. No software to install, no account needed, no file uploads — complete privacy guaranteed.

Supported Conversions

Convert MP4 to WebM, WebM to MP4, MOV to MP4, AVI to WebM, MKV to MP4, and many more combinations. The tool re-encodes the video using the browser's built-in MediaRecorder API with VP8 or VP9 codec for maximum compatibility across devices and platforms.

Advanced Settings Explained

Resolution scaling lets you downscale HD videos to 720p or 480p for smaller file sizes. Aspect ratio conversion is useful for repurposing landscape videos into vertical format for Reels and TikTok (9:16) or square format for Instagram posts (1:1). Custom bitrate gives you precise control over output file size — lower bitrate means smaller files at the cost of quality. Trimming lets you extract specific clips from longer videos without any additional editing software.

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