Convert MP3 to MP4 Online | Free, Unlimited & Quick

Convert MP3 to MP4 in three steps

01
Sign up and get free transcription time
Create a free Descript account and sign in. You get one hour of free transcription each month—no credit card needed. This allows you to explore all features and swiftly convert your MP3 files to MP4.
02
Create a new project and upload MP3
Start a new project in Descript, then drag and drop your MP3 file directly into it. Descript takes care of processing online, keeping your workflow straightforward from start to finish.
03
Select export options and save as MP4
To convert your MP3 to MP4, open the top menu and select Publish. Then click Export and pick MP4. Finally, click Save to finalize. This quick step transforms your audio files into a widely supported video format.

Convert your MP3 files to MP4 easily

Convert videos to 60 FPS with ease
Enhance video quality through Descript’s 60 FPS settings. If you want to convert MP3 to MP4 or upgrade existing clips, you’ll experience clear and steady playback. Offer your audience sharp, fluid visuals that hold their attention.
Non-destructive video conversion
Descript’s non-destructive approach preserves your original MP3 files while converting them to MP4. You can also edit and polish your videos without downgrading audio quality, making it straightforward to produce appealing multimedia.
Flexible export choices
Descript offers several export settings, keeping the MP3 to MP4 process hassle-free. For social sites, demos, or teaching materials, adjust the export to your needs. Transform your audio into captivating video format in minimal steps.

More than an MP3 to MP4 converter

Descript is an AI-driven audio and video editor that operates like a document, perfect for podcasts and video content.

Templates
Easily convert MP3 to MP4 using flexible templates that help produce a refined multimedia result.
Collaboration
Coordinate with your team as you convert MP3 to MP4. Everyone can offer input and remain on task throughout the process.
Video editing
Convert MP3 to MP4 and take advantage of Descript's straightforward video editing tools for a stress-free multimedia process.
Transcription
Transcribe your MP3 while converting to MP4, improving accessibility and streamlining content production.

Don’t just take our word for it

With a 4.6-out-of-5-star rating and a bunch of distinctions on G2, Descript’s users have declared it an industry standard in the video and podcasting world.

2025

Best Software

Video Editing

Text to Speech

Screen and Video Capture

“With Descript I'll be able to at least double my content output since editing is taking one-quarter the time it used to.”

Donna B.

“With Descript we can create videos for our YouTube channel and our LinkedIn page much faster and with high quality.”

Balázs N.

“Descript has made cleaning up and creating my educational videos into professional presentations [possible] without needing extensive technical computer skills.”

Barbara C.

“Descript makes recording and editing audio and video a breeze. It's advanced features have streamlined my workflows, saving me a lot of time usually spent editing.”

Roderick F.

“The collaborative tools streamline teamwork, allowing my team and me to work efficiently together on projects. Overall, Descript enhances productivity and simplifies the editing process.”

Aldrich M.

“Transcription based editing makes the process much faster…All in all, a must have editor for most audiences, especially in SaaS marketing.”

Nidhin M.

Surely there’s one for you

Free

no credit card required

Start your journey with text-based editing

Get started

1 transcription hour / month

Export 720p, with watermarks

Limited trial of Basic AI Actions

Limited trial of AI Speech

Hobbyist

$16

per person / month, billed annually

Elevate your projects, watermark-free

Get started

10 transcription hours / month

Export 1080p, watermark-free

20 uses / month of Basic AI Actions suite including Filler Word Removal, Studio Sound, Draft Show Notes, Create Clips, and more

30 minutes / month of AI speech with stock AI speakers and custom voice clones

5 minutes / month of avatars

Questions? We have answers

What audio quality can I expect when converting MP3 to MP4 using this tool?
Descript keeps the audio fidelity close to your original MP3, so there's virtually no loss in sound clarity during the conversion.
Are there any limitations on the length or size of the MP3 files I can convert?
Descript does not strictly cap file length or size. Files under 2GB typically convert faster, but larger files may need additional time to process.
What pricing plans does Descript offer for its users?
Descript provides multiple tiers to fit your needs. The Free plan offers standard features, while the Creator plan costs $12 monthly for advanced tools. The Pro plan is $24 per month with extra benefits, and custom Enterprise setups are also offered.
Does Descript support collaboration features for team projects?
Yes. Descript includes real-time teamwork features, allowing multiple people to edit, comment, and see changes instantly. This keeps all contributors in sync.

Convert your MP3 to MP4

Convert MP3 to MP4 in three steps

Convert your MP3 files to MP4 easily

More than an MP3 to MP4 converter

Surely there’s one for you

Questions? We have answers