Convert WebM to 3GP Online
Convert WebM browser recordings and screencasts to 3GP for sending to basic phones via MMS or microSD. Free, no uploads.
.webm · up to 100 MB
Web to basic phone
WebM to 3GP: take web videos to any feature phone
VP8/VP9 to H.264 Baseline
Convert browser WebM with VP8 or VP9 to 3GP with H.264 Baseline compatible with Nokia Series 40, Samsung SGH, and similar.
Ready for MMS sending
Generate 3GP clips of 1–5 MB per minute, perfect for sending via MMS to basic phones with a messaging plan.
No uploads, private
Your screen recordings are converted locally in the browser without passing through external servers.
microSD plug-and-play
Copy the .3gp to a microSD, insert it in any basic Nokia, and play the video without installing anything.
How it works
Three steps, no hassle
Upload your WebM file
Drag or select your .webm: Chrome screen recordings, VP8 or VP9 clips downloaded from the web, Google Meet screencasts.
Re-encode to 3GP in the browser
FFmpeg.wasm decodes VP8 or VP9 from the WebM, reduces resolution to CIF (352×288) or QCIF (176×144), and re-encodes to H.264 Baseline in a 3GP container.
Download your 3GP
Get the small .3gp clip ready to send via MMS, Bluetooth, or copy to a microSD card for playback on any basic phone.
FAQ
Got questions?
The primary use case is sharing browser videos or web downloads with people who use basic phones without internet access. Modern browsers generate WebM with VP8 or VP9, which basic phones cannot play. Converting to 3GP with H.264 Baseline allows sending that video via MMS or microSD to any Nokia Series 40, Samsung SGH, or basic Motorola that supports 3GP video playback.
Yes, because the conversion not only changes the container but also re-encodes the video: VP9 is decoded and re-encoded to H.264 Baseline — the maximum-compatibility codec for 3GP. Basic phones never see the original VP9; they only see the H.264 Baseline generated by FFmpeg.wasm, which is the codec those devices natively support.
Yes. Chrome's MediaRecorder API uses VP8 by default for screen and webcam recordings. FFmpeg.wasm correctly decodes VP8 and converts it to H.264 Baseline for 3GP. A 5-minute Chrome screen recording at 720p in VP8 (about 50 MB) converts to a 3GP of approximately 5 MB at CIF 256 kbps, perfectly transferable via microSD.
Exactly. If you record a screen or download a web video in WebM and want to send it to someone with a Nokia 6300 or similar (no WhatsApp, no internet), the workflow is: convert to 3GP with this tool, copy the .3gp to a microSD card, insert the microSD in the Nokia, and the video will be in the phone's gallery ready to play. Alternative: send the 3GP via MMS if the recipient has an active messaging plan.
WebM files have Opus or Vorbis audio. In the 3GP conversion, audio is re-encoded to AAC-LC mono at 12.2 kbps (the 3GP audio standard for 3G networks, defined in 3GPP Release 4) or AMR-NB (Adaptive Multi-Rate Narrowband). Both audio formats are playable through the mono speakers of period basic phones.
Significant but expected given the use case. VP9 is a modern, efficient codec; H.264 Baseline at CIF is designed for 352×288 pixel screens at 128–256 kbps. Most of the quality loss comes from the resolution downscale (from 720p or 1080p to CIF), not from the codec change itself. For the intended use case (playback on a 2.5-inch Nokia basic phone screen), the resulting quality is perfectly adequate.
Convert WebM to 3GP: web recordings and screencasts for basic phones, VP8/VP9 to H.264 Baseline CIF, MMS and microSD
WebM is the web video format developed by Google in 2010, based on the Matroska container with VP8 video codec (released May 2010, acquired by Google through the purchase of On2 Technologies in August 2010) or VP9 (released June 2013). Since 2013, the MediaRecorder API in Chromium-based browsers and Firefox has used WebM as the native recording format, meaning all browser-based screen recording tools — Google Meet, Loom, Screencastify, Chrome's Screen Recorder extension, and direct recordings with navigator.mediaDevices.getDisplayMedia() — generate .webm with VP8 or VP9. Videos downloaded from web platforms (YouTube, Vimeo, Dailymotion) are also frequently downloaded in WebM+VP9 when using download tools that do not force a specific format. The 3GP format was defined by the 3GPP consortium (3rd Generation Partnership Project) in specification TS 26.234 of 2001, as part of the Release 4 standard for UMTS/3G networks. The original goal of 3GP was to define a universal video format for third-generation mobile devices with very limited processing capabilities (100–500 MHz ARM processors, 1.5 to 2.8 inch screens, no H.264 hardware acceleration). The technological gap between a WebM VP9 1080p (a 2013 codec optimized for modern multi-core processors) and a 3GP H.264 Baseline QCIF from 2005 precisely defines the problem this conversion solves.
Converting WebM to 3GP in 2024–2026 addresses a scenario of asymmetric connectivity that persists globally: the sender has internet access and generates or downloads video in WebM, while the recipient has a basic phone without data and can only receive video via MMS or physical microSD card transfer. This scenario is common in intergenerational digital divide contexts (young sender with smartphone, elderly recipient with basic Nokia), in rural areas with 2G coverage but no functional mobile data, and in countries where basic phones maintain significant usage rates. For the specific case of screen recordings (screencasts): when someone needs to explain how to use an application, show a website, or send a visual demonstration to someone without a smartphone, recording the screen in Chrome generates a WebM that the recipient cannot open on their basic Nokia. Converting to 3GP and sending via MMS or microSD is the only solution that does not require the recipient to have a smartphone, data, or streaming platform access. A 30-second screencast at QCIF (176×144) at 128 kbps weighs approximately 500 KB, just within the MMS limit of most carriers.
Convertir.ai converts WebM to 3GP directly in the browser with FFmpeg.wasm without sending files to external servers. The process decodes the VP8 or VP9 stream from the WebM container, applies bicubic resolution scaling filters (from 720p or 1080p to CIF 352×288 or QCIF 176×144), re-encodes to H.264 Baseline Profile level 1.3 (for QCIF) or level 3.0 (for CIF) with a target bitrate of 64–256 kbps depending on resolution, and generates the 3GP container with correct stream headers for 3GPP mobile device playback. The Opus or Vorbis audio from the WebM is re-encoded to AAC-LC mono at 12.2 kbps (the standard 3GP audio profile for 3G networks, defined in 3GPP TS 26.234). The result is playable on Nokia Series 40 5th Edition onward (Nokia 6300, 5200, 6101, 6300i, E65, N70), Samsung SGH E and F series (SGH-E250, SGH-F400), Sony Ericsson Walkman W-series (W580i, W760i), and Motorola RAZR V8 and later. The WebM-VP9 to 3GP conversion is especially useful for instructors, educators, or technical support staff who need to send short visual explanations to elderly people with basic phones: the basic Nokia screen, though low-resolution, is perfectly capable of displaying text and UI elements if the clip is recorded at a low screen resolution and transmitted at QCIF or CIF. No registration, no watermark, no quantity limits, with fully local processing.