WebAssembly & WebCodecs Engine

16:9 Landscape to 9:16 Vertical Video

Center-crop or blur-pad landscape 16:9 footage into 9:16 portrait video for TikTok, Shorts, and Reels. Fast, high-fidelity media processing tool.

Input Formatmp4
Output Formatmp4
Target ConstraintAdaptive
Security ModelLocal Sandbox

Drop your media or documents here

Drop files, browse from your device, or paste

Drop your video file here or browse

Supports MP4, MOV, MKV, WebM, AVI, and GIF. High-efficiency video compression.

MP4MOVMKVWEBMGIFCtrl+V to Paste

Compression Engine

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Intelligent Automatic Mode

Analyzes video resolution, bitrate, and audio streams automatically. Applies optimal CRF 23 with a 1080p limit for the sweet spot between high clarity and minimal file size.

Target QualityCRF 23
Max Resolution1080p Full HD
Hardware SpeedWebCodecs GPU
←Upload another file
Image Compression Studio
🖼️

Drop your photo here, or browse files

Supports JPG, PNG, WebP, AVIF, HEIC, BMP, and ICO photos. Fast in-browser processing.

JPG / JPEGPNGWebPAVIFiPhone HEIC
Recommended One-Click Preset

Automatic WebP Optimization

Converts to modern WebP at 80% quality and strips EXIF metadata for complete privacy, preserving visual sharpness.

✓80% WebP Quality
✓GPS & EXIF Stripped
✓Client-Side Processing

Audio DSP Studio

LOADING...
Selection:00:00.0 ➔ 00:00.0
Duration:0.0s
IN (Crop Start)
OUT (Crop End)
128k MP3 Standard + Normalization-0.17 dBFS

Loudness peak normalization with anti-clipping headroom.

Target Audio FormatMP3 (Universal)
Est. Size:Calculating...
Web Audio DSP Engine

How to 16:9 Landscape to 9:16 Vertical Video

Follow these simple steps to process your media entirely within your browser:

1

Choisir le fichier

Déposez votre fichier dans la zone prévue dans votre navigateur.

2

Compression

Ajustez le niveau de qualité pour atteindre le poids de fichier souhaité.

3

Enregistrer

Téléchargez immédiatement votre fichier optimisé sur votre appareil.

Technical Encoding Specifications

Deterministic encoding parameters applied directly within your device's browser memory.

Input Specmp4 Container
Target Containermp4
Maximum TargetAdaptive Dynamic Rate
Resolution Filter1080 × 1920 px
Processing EngineHigh Efficiency Video Core
Data PolicyXicae Privacy Standard
Storage ModelOPFS Sandboxed
ComplianceStandard ISO Base

Architecture Comparison: Client-Side vs Cloud Upload Services

Evaluation CriteriaCompress.Xicae.Dev (Local)Traditional Cloud Converters
Execution EnvironmentIn-browser execution via WebAssemblySent to 3rd-party remote cloud servers
Upload Wait TimesFast (Direct in-browser memory mapping)Slow (Limited by internet upload bandwidth)
File Size LimitsHardware limited (Gigabytes supported)Restricted by paywalls (often 25MB-100MB caps)
Encoding PipelineModern multi-threaded performance engineStandard shared queue encoding

Frequently Asked Questions

Technical details, format compatibility, and encoding specifications.

Why optimize footage from Aspect Scaler?▼
Center-crop or blur-pad landscape 16:9 footage into 9:16 portrait video for TikTok, Shorts, and Reels.
Comment les fichiers sont-ils traités ?▼
Les fichiers sont traités directement dans votre navigateur à l’aide d’encodeurs performants. Pour en savoir plus, consultez la politique de confidentialité de Xicae.
Does this maintain high resolution?▼
Yes, color fidelity and audio tracks are preserved while eliminating bloated uncompressed bitrates.

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