M
MacroKit

Convert Video Online

Change video format instantly — no upload, no watermark

100% Private
Unlimited
Fast

CONVERT VIDEO INSTANTLY

Change video format between MP4, WebM, MKV and 12+ formats — right in your browser. No uploads, no watermarks, 100% private.

Drop your video to get started
Features

Video File Converter for All Formats

Our media converter handles all popular formats. Whether you need MP4 for compatibility or WebM for the web, we've got you covered.

01

MP4 — Universal Playback

The universal standard. Change video format to MP4 for maximum compatibility — plays on every device, browser, and platform without issues.

Best choice when you need a video file converter for sharing across platforms.

02

Switch to WebM

Open web format with superior compression. Export to WebM for smaller files with excellent quality. Ideal for HTML5 embedding and web streaming.

Optimized for web delivery — use this media converter for streaming.

03

Quality Control

Choose High, Medium, or Low output quality. Higher quality means sharper detail but larger files. Fine-tune every conversion to your needs.

Full control when you change video format settings.

04

12+ Format Support

Switch between MP4, MKV, WebM, AVI, MOV, WMV, FLV, 3GP, MPEG, OGV, M4V, and GIF. Any source format, any target format.

Complete format flexibility — any source to any target with one click.

How It Works

How to Convert Video in 3 Steps

UPLOAD

Load Your Video

Drag and drop your file. This video file converter supports MP4, MKV, WebM, AVI, MOV, and 7 more input formats.

01UPLOAD

Load Your Video

Drag and drop your file. This video file converter supports MP4, MKV, WebM, AVI, MOV, and 7 more input formats.

CONFIGURE

Choose Format & Quality

Select your target format. Adjust quality (High/Medium/Low) and encoding speed as needed.

02CONFIGURE

Choose Format & Quality

Select your target format. Adjust quality (High/Medium/Low) and encoding speed as needed.

DOWNLOAD

Process & Download

Click the button and download instantly. This media converter processes everything locally in your browser.

03DOWNLOAD

Process & Download

Click the button and download instantly. This media converter processes everything locally in your browser.

Benefits

Why Use a Local Media Converter?

Cloud services make you upload, wait, then download. Our video file converter starts processing instantly — no server needed.

Complete Privacy

Your files never leave your device during conversion — essential for sensitive content.

Instant Start

Start processing the instant your file loads — no upload queue, no waiting for servers.

No Limits

Process files of any size without hitting server quotas. Your RAM is the only limit.

Technical Specs

Technical Specs

macrokit-specs
$ mode --fast

Adjust encoding speed to control output. Fast for quick jobs, Slow for optimal compression. This media converter gives you full control over the balance between speed and quality.

Slower encoding produces smaller files at the same quality level.

Specifications
Formats12+
ProcessingLocal
Max Size∞
CostFree
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Comparison

Why MacroKit?

See how our video converter compares

MacroKit
VS
Others
No Download Required
No Download Required
No Download Required
100% Private
100% Private
100% Private
No Watermarks
No Watermarks
No Watermarks
No Account Required
No Account Required
No Account Required
Works Offline
Works Offline
Works Offline
Completely Free
Completely Free
Completely Free
FAQ

Video Converter FAQ

Yes! This tool processes everything locally in your browser using FFmpeg WASM. Your files never upload to any server, giving you complete privacy.
Switch between MP4, MKV, WebM, AVI, MOV, WMV, FLV, 3GP, MPEG, OGV, M4V, and GIF. The tool auto-detects input format automatically.
Upload your file, select MP4 as target format, choose quality, and press the button. Your MP4 downloads in moments.
Yes! Since processing happens in your browser, there's no server limit. Your computer's RAM is the only constraint.
Quality controls the CRF value during encoding. High = best visuals but larger files. Medium = balanced. Low = smaller files with reduced quality.
Yes — slower presets produce smaller files at the same quality. Use Fast for quick jobs; Slow for final exports where file size matters.
WebM offers better compression, resulting in smaller files. But MP4 has broader compatibility. Use WebM for web; MP4 for universal playback.
Yes! Chrome on Android works well for moderate files. iOS Safari is slower due to WASM limits. Desktop recommended for large files.
Time depends on file size, CPU, and speed setting. A typical 5-minute 1080p file takes 30-90 seconds on a modern laptop.
Re-encoding involves some quality loss, but it's minimal with High settings. Use High quality and slower speed for best results.

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Ready to Convert Video?

Drop your file above and start converting instantly — free, private, unlimited.

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Use Responsibly

Only process content you own or have rights to use. Respect copyright and platform terms.