Is it safe to convert FLV to MKV online?

Yes! Convert999 processes all files directly in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

How long does it take to convert FLV to MKV?

Conversion is nearly instant for most files. Large files may take a few seconds depending on your device's processing power.

Is there a file size limit?

Convert999 supports files up to 2GB. Processing happens locally, so larger files depend on your device's available memory.

Do I need to install any software?

No installation required. Convert999 works entirely in your web browser on any device.

Free · No Upload · Instant

Convertir FLV en MKV en Ligne — Gratuit et Rapide

Convertisseur gratuit FLV vers MKV en ligne. Convertissez vos fichiers Flash Video en format Matroska Video instantanément.

Choisir des Fichiers

ou glissez-déposez vos fichiers ici

Taille max : 2 Go

Vos fichiers sont traités localement dans votre navigateur. Rien n'est envoyé à un serveur.

Comment Convertir FLV en MKV

Importez votre fichier FLV en cliquant sur "Choisir des Fichiers" ou par glisser-déposer.

Sélectionnez MKV comme format de sortie.

Cliquez sur "Convertir Maintenant" et téléchargez votre fichier converti.

À propos du Format FLV

Extension: .flv
Full name: Flash Video

À propos du Format MKV

Extension: .mkv
Full name: Matroska Video

Questions Fréquentes

Est-il sûr de convertir FLV en MKV en ligne ?

Oui ! Convert999 traite tous les fichiers directement dans votre navigateur. Vos fichiers ne sont jamais envoyés à un serveur.

Combien de temps faut-il pour convertir FLV en MKV ?

La conversion est quasi instantanée pour la plupart des fichiers.

Y a-t-il une limite de taille de fichier ?

Convert999 prend en charge les fichiers jusqu'à 2 Go.

Dois-je installer un logiciel ?

Aucune installation requise. Convert999 fonctionne entièrement dans votre navigateur.

Can I convert FLV to MKV on my phone?

Yes! Convert999 works on any device with a web browser — iPhone, Android, iPad, or desktop. No app installation required. Simply open the converter, upload your FLV file, and download the converted MKV file.

Will I lose quality converting FLV to MKV?

Convert999 uses high-quality conversion algorithms to minimize quality loss. For lossless formats, the conversion is exact. For lossy formats like images and audio, we use optimized settings that balance quality and file size.

Can I batch convert multiple FLV files to MKV?

Yes, Convert999 supports batch conversion. Select or drag & drop multiple FLV files and convert them all to MKV format at once. Each file is processed locally in your browser.

What is the difference between FLV and MKV?

Flash Video (FLV) and Matroska Video (MKV) differ in compression, compatibility, and features. FLV is optimized for its native use cases, while MKV may offer different advantages. Visit our FLV vs MKV comparison page for a detailed breakdown.

Why Convert FLV to MKV?

Advantages

✓Matroska Video offers better compatibility with modern applications and workflows
✓Converting is completely free with no file size limits on Convert999
✓Your files never leave your device — 100% private and secure conversion
✓Instant conversion without waiting for server processing

Key Differences

→FLV (Flash Video) is optimized for its native use cases
→MKV (Matroska Video) may offer different compression or feature set
→Choose based on your target platform, quality needs, and file size requirements

Conversions Associées

FLVMP4 FLVAVI FLVMKV FLVMOV FLVWMV FLVWEBM MP4MKV AVIMKV MOVMKV WMVMKV FLVMKV WEBMMKV

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