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Best 7 Free Online Converters in 2025: Convert Video/Audio Online

Updated on Mar 19, 2025

Converting video and audio files can help solve compatibility, storage, and other issues. If you want to find a reliable online converter to convert your video and audio files without installing any software, read this post to learn the top 7 free online video converters.

Besides, for converting multiple large files and enjoying more advanced features, you're recommended to download and try this all-in-one desktop video converter.

https://www.videoconverterfactory.com/download/hd-video-converter-pro.exe hd-video-converter-pro.exe

🤔 Why Do We Need Online Video/Audio Converters?

📜 Top 7 Free Online Video & Audio Converters

✨💡🌟 Bonus: The Best All-in-one Video & Audio Converter for PC

👉🏻 Convert Any Local Video & Audio Files to 500+ Presets

👉🏻 Download/Convert Online Videos & Music from YouTube and Other Sites

🤔 Why Do We Need Online Video/Audio Converters?

Converting file formats is always needed in our daily lives. Through video/audio conversion, you can:

🟢 Play, edit, and share your video and audio files without format compatibility issues;

🟢 Shrink file size while keeping the quality;

🟢 Extract audio to obtain audio-only tracks;

......

When the conversion needs come, many people may consider free online video/audio converters for the following reasons:

✔️ Convenient and free to use;

✔️ No software installation requirement;

✔️ Different uploading and saving sources;

✔️ Compatible with almost all OS and web browsers;

✔️ Easy to share and collaborate with other platforms

✔️ Some are bundled with additional editing features;

......

📜 Top 7 Free Online Video & Audio Converters

1️⃣. Mconverter

Mconverter is a popular free online video converter that enables users to convert video and audio files from local drive, Google Drive, Onedrive, and Dropbox. It offers many output video and audio options that can suit most conversion needs.

🌐 Website: https://mconverter.eu/

Mconverter

✨ Main Features:

🔹 Convert video and audio files from most sources;
🔹 Support a wide array of formats for input and output;
🔹 Able to convert images, documents, and other files;
🔹 Accessible on any device;

❌ Limitations:

♦️ No file adjusting or editing features;
♦️ 10 free conversions per day;
♦️ Maximum 100 MB for each file and requires watching ads for converting files over 10 MB;
♦️ Surrounding ads when converting files.

2️⃣. Convert2MP3

Convert2mp3 is an online video converter that specializes in converting online videos to MP3 and MP4 formats. It can convert online videos from YouTube, Dailymotion, Clipfish, etc. with a video URL.

🌐 Website: https://convert2mp3.cx/de1/

Convert2MP3

✨ Main Features:

🔹 Convert online videos to video or audio format;
🔹 Simple conversion process without ads;
🔹 Support nearly 500+ websites, including YouTube.

❌ Limitations:

♦️ Cannot convert local video and audio files;
♦️ Limited output formats;
♦️ Sometimes fail to start conversion.

🔥🔥 Hot Search: Convert Online Videos to MP3 Effortlessly with Convert2mp3 and Convert2mp3 Alternative.

3️⃣. Convertio

Convertio is a powerful online converter that enables you to convert video, audio, and other file types. It supports almost all video and audio formats and offers many output options. Besides conversion, you can also adjust the output settings and edit the video by trimming, cropping, etc.

🌐 Website: https://convertio.co/

Convertio Online Converter

✨ Main Features:

🔹 Multiple video-importing sources;
🔹 Support most video and audio formats for input and output;
🔹 No ads and watermark;
🔹 Adjust output settings and edit files.

❌ Limitations:

♦️ Max file size 100 MB;
♦️ 10 conversions per day.

4️⃣. Online-convert

Online-convert offers 10+ conversion modules for video, audio, image, and other file types. It supports most video and audio files from local, cloud services, and even URLs. Besides conversion, it can also alter the video and audio settings and offer some basic editing features.

🌐 Website: https://www.online-convert.com/

Online-convert

✨ Main Features:

🔹 Various modules for video, audio and other conversion needs;
🔹 Edit and customize output settings;
🔹 Support Bulk file conversion.

❌ Limitations:

♦️ 8 conversion minutes;
♦️ Maximum 100 MB file size;
♦️ Require login to get started.

5️⃣. Zamzar

Zamzar is a free and online all-inclusive file converter that supports converting video, audio, and other files with 1000+ formats supported. It supports many video-uploading sources. and downloading videos using URLs is also available. The simple interface allows you to quickly convert files without additional settings.

🌐 Website: https://www.zamzar.com/

Zamzar

✨ Main Features:

🔹 Simple & fast conversion process
🔹 Support converting local and online video/audio files
🔹 No ads and watermark

❌ Limitations:

♦️ No additional features besides conversion;
♦️ Max file size 50MB;
♦️ 2 free conversion per day.

6️⃣. CloudConvert

CloudConvert supports 200+ formats for video, audio, image, and other conversion needs. Users can upload files from computers, online drives, and links. It also supports batch conversion and allows you to adjust and edit the output file settings.

🌐 Website: https://cloudconvert.com/

Online-convert

✨ Main Features:

🔹 Multiple file importing sources;
🔹 Convert online and local files;
🔹 Support file adjusting and editing;
🔹 No ads or watermark

❌ Limitations:

♦️ Max file size 1GB;
♦️ 10 conversions per day.

7️⃣. FreeConvert

FreeConvert is a handy online tool that can convert your video and audio files to many formats. It supports converting files from local drives, cloud services, and URLs. Besides converting files, it allows you to adjust the output file settings and trim, rotate, flip videos, add subtitles to videos, etc.

🌐 Website: https://www.freeconvert.com/

FreeConvert

✨ Main Features:

🔹 Support various video and audio conversions;
🔹 Change video quality and size;
🔹 Bulk file conversion;
🔹 Simple editing features.

❌ Limitations:

♦️ Max file size 1GB;
♦️ 20 conversion minutes per day;
♦️ Contain ads.

Above are the top seven best online converters. With these online video/audio converters, you can easily convert your local video (audio) files or download/convert online videos/music to your desired formats. Some even offer editing and adjusting options and allow you to convert large files up to 1 GB.

Though convenient for most conversion needs, online converters also have some deficiencies:

🚫 Cannot work without an internet connection and usually crashes when the network is unstable.

🚫 Impose restrictions on file size, conversion time, and quantity.

🚫 Some contain pop-ups and misleading ads.

🚫 The output options are limited.

🚫 Slow conversion speed.

Therefore, if you have multiple files to convert or want to convert large videos quickly while keeping the quality, a desktop video converter can be a better choice.
The following shares the best all-in-one desktop online& local video converter - WonderFox HD Video Converter Pro.

✨💡🌟 Bonus: The Best All-in-one Video & Audio Converter for PC

Online converters cannot satisfy your conversion needs? Let WonderFox HD Video Converter Factory Pro become your capable assistant in converting video/audio formats and downloading online videos.

As the best online video converter alternative, it can convert online and local video/audio to 500+ formats and device presets at lightning speed. It also supports batch conversion which can line up multiple files and convert up to 10 files simultaneously in one click to save your time. You can also enjoy more features as below:

Powerful All-in-one Video Processing Toolkit

1. 500+ predefined presets for fast format conversion.
2. Download video/song from YouTube, Vimeo & 1000+ sites.
3. Compress large video/audio files with imperceptible quality loss.
4. Record live streams, concerts, gameplay, webinar, webcam...
5. Make animated GIFs from video or image sequence.
6. Trim, split, merge, crop, rotate, flip, watermark video at will.
7. Make ringtones, extract subtitle file and more...

Free Download

Product Page

Compatible with

Windows, 100% Clean!

✍️🏻 Convert Any Local Video & Audio Files to 500+ Presets

Before start, please free download free download and install this HD video converter to your Windows computer. Then launch it.

Step 1. Open the "Converter" module.

Step 2. Click "Add Files" or drag your files into the program.

Step 3. Press the format image on the right side to expand the output format list and select a desired output format or device preset

Optional: Before starting the conversion, you can edit the files with the toolbar or open the "Parameter settings" window to adjust the output video & audio settings.

Step 4. Set your output folder and click "Run" to start the conversion.

💡 Hardware acceleration (Intel QSV and Nvidia NVENC) is available for H264 and H265/HEVC encoding.
💡 Once finished conversion, you can click "Open" on the pop-up window to quickly access the converted files.
💡 When encoding H264 and H265/HEVC files, the concurrent conversion files are limited to 1~2 at a time.

✍️🏻 Download/Convert Online Videos & Music from YouTube and Other Sites

WonderFox HD Video Converter Factory Pro can also be a top YouTube video converter/downloader to convert URLs to video with 1000+ website support, like YouTube, Facebook, Bitchute, Dailymotion, etc. The online video converting steps are also quite simple:

Step 1. Launch HD Video Converter Factory Pro and open the Downloader interface.

Step 2. Click on the New Download button.

Step 3. Copy and paste the video URL into the blank Paste URL box. Then press "Analyze".

Step 4. Choose a download option and click OK to save your choice.

Step 5. Then press the Download All button to convert and download online videos.

If the given download options don't satisfy your needs, you can first download them and then import them into the "Converter" module to change the file format and modify output resolutions, bitrate, etc.

Hot search: Top 9 Free Video Converters l HD Video Editing Software l 4k Video Converter

At last...

The above are all the free online converters I want to share with you. You can choose one according to the features and limitations of each tool to start your video/audio conversions.

By the way, if you have multiple large files to convert, have constant needs for file conversion, and demand a fast conversion speed, WonderFox HD Video Converter Factory Pro is definitely the best choice for you! You can download it here to have a free try first.