WebP to 3GP Converter

How to Convert WebP to 3GP Online

1. Upload Your WebP Files: Drag and drop or click "Add Files" to select one or more WebP images. Batch upload is supported — every uploaded image will become a frame in the resulting slideshow when Merge Strategy is set to "Merge images".
2. Pick Merge Strategy and Duration: Under Merge Strategy choose "Merge images" for one combined 3GP, or "Video per image" for a separate 3GP per file. Set Duration per image from 1/60 second up to 10 seconds — 3–5 seconds is typical for slideshows; 1/24 or 1/30 second works for stop-motion. Pick Background Color (Black is default; 24 named colors available) for the letterbox that fills any aspect-ratio mismatch.
3. Set Quality and Resolution (Optional): Under File Compression pick a Quality Preset (Highest through Lowest), Constant Bitrate, Variable Bitrate, Constant Quality (CRF), Target file size %, or Specific file size in KB/MB. Under Video Resolution choose a Preset Resolution (240p, 360p, 480p, 720p), a Fixed Resolution (176×144 QCIF, 320×240 QVGA, 640×480 VGA), or enter Width × Height directly. 3GP is designed for small mobile screens; resolutions above 640×480 defeat the format's purpose.
4. Convert and Download: Click Convert. Files process in your browser session — no sign-up, no watermark, no email required. Output is a .3gp file that plays on Android, iOS, VLC, and any device with a 3GPP-compliant decoder.

Why Convert WebP to 3GP?

3GP is a container format defined by the 3rd Generation Partnership Project (3GPP) in TS 26.244, originally specified for 3G UMTS multimedia services. It is based on the ISO Base Media File Format (MPEG-4 Part 12) and was designed for the bandwidth and storage constraints of early mobile networks. WebP, by contrast, is Google's modern image format — lossless WebP is roughly 26% smaller than PNG, and lossy WebP is 25–34% smaller than JPEG at comparable quality. Converting WebP stills into a 3GP video gives you a tiny mobile-friendly clip that plays where animated WebP or modern video formats may not.

• MMS-sized clips for SMS gateways — Carrier MMS payloads are commonly capped between 300 KB and 1 MB depending on operator; a 3GP file at 176×144 with H.263 video and AMR-NB audio routinely fits inside that envelope where MP4/H.264 at the same length does not.
• Feature phones and legacy Android — Devices built before Android 5.0 (2014) and most KaiOS / Series 40 feature phones decode 3GP natively but have no WebP image decoder; a silent 3GP slideshow lets you deliver image content to that hardware.
• Embedded systems and IoT firmware — DVRs, intercoms, in-vehicle infotainment, and dashcams from the 2010s frequently expose only a 3GP/H.263 decoder; convert WebP product photos or screenshots into 3GP to play them on those devices without firmware updates.
• Mobile-network test labs — RAN engineers and QA teams still use 3GP clips as test vectors for PSS (Packet-switched Streaming Service) and IMS/MMS sessions because the format is mandatory in those 3GPP specs.
• Stop-motion and time-lapse from WebP frames — Setting Duration to 1/24 or 1/30 second turns a batch of WebP stills into a true motion clip; 3GP keeps the resulting file small enough to share over slow connections.
• Archival or compliance workflows — Some legal-hold and evidence-management systems accept 3GP but reject WebP because 3GP predates and is well-documented in ETSI/3GPP standards while WebP appeared in 2010.

For a modern mobile format with broader support, use WebP to MP4 instead. The 3G2 variant (WebP to 3G2) is the CDMA equivalent of 3GP and produces slightly smaller files on some encoders. If you only need a static image, WebP to PNG preserves transparency without wrapping the result in a video container.

WebP vs 3GP — Format Comparison

3GP Codec and Quality Guide

Frequently Asked Questions

Will the output 3GP have any audio?

No. WebP is an image-only format, so the resulting 3GP is a silent video. The Audio Codec setting only writes a header entry — there is no audio stream because the source has none. If you need narration or music, convert the slideshow to MP4 first with WebP to MP4 and use a desktop editor to add a track, then re-encode to 3GP.

Why is 3GP still useful when MP4 exists?

3GP is required by ETSI 3GPP specifications for MMS, IMS, MBMS, and PSS (Packet-switched Streaming Service), so it remains in use on carrier infrastructure and legacy mobile devices. A 320×240 3GP clip with H.263 video typically weighs a few hundred KB — small enough for MMS payloads that range from roughly 300 KB to 1 MB depending on carrier — while an equivalent MP4/H.264 file tends to land above that ceiling. For modern phones and the open web you should still prefer MP4 or WebM.

What's the difference between 3GP and 3G2?

Both are MPEG-4 Part 12-based containers. 3GP (.3gp) was specified by 3GPP for UMTS/GSM networks; 3G2 (.3g2) was specified by 3GPP2 for CDMA2000 networks (Verizon, Sprint, KDDI). Codec sets overlap heavily — both support H.263, MPEG-4 Part 2, H.264, and AMR — but 3G2 additionally allows EVRC and SMV (CDMA-specific speech codecs). If you don't know which one your target device wants, 3GP is the safer default; 3G2 only matters on devices tied to legacy CDMA carriers.

What resolution should I pick?

3GP was designed for small mobile screens. Use 176×144 (QCIF) for pre-2005 feature phones and the smallest possible files, 320×240 (QVGA) for older smartphones and most MMS scenarios, and 640×480 (VGA) as the practical upper bound. Anything above 640×480 increases file size without improving playback on real 3GP-target hardware — at that point switch to MP4. WebP images are usually much larger than these resolutions; the converter will downscale to fit while preserving aspect ratio via the Background Color letterbox.

Why is the Trim option not visible?

Trim is hidden whenever the source is image-only because there is no incoming video timeline to cut. Control total length instead by setting Image Duration and adjusting how many WebP files you upload — total seconds = (number of images) × (duration per image). For a 30-second slideshow upload 10 WebP files at 3 seconds each, or 6 files at 5 seconds each.

Will animated WebP frames be preserved?

No — animated WebP is treated as a single still image (the first frame) by the image-to-video pipeline. If you need every frame of an animated WebP to appear in the output video, convert the animated WebP to a frame sequence first with WebP to PNG, then upload the resulting PNG batch here and pick an Image Duration that matches the original frame interval (typically 1/24 or 1/30 second).

Can modern iPhones and Android phones play 3GP?

Yes. Android has played 3GP natively since 1.0 (2008), and iOS has played 3GP video since iOS 3 (2009) via the native Photos / Files apps as long as the inner video codec is H.264 or H.263. Older devices may only support 3GP files with H.263 video — that is why H.263 remains a useful codec choice when you need the broadest compatibility. VLC plays every common 3GP variant on desktop.

How small will my 3GP file be?

A 30-second slideshow at 320×240 with H.263 video typically lands between 100 KB and 500 KB depending on motion (slideshows have very little motion, so file size stays low). At 640×480 with H.264 the same clip lands between 500 KB and 2 MB. WebP source resolution does not change output size — the encoder downscales to your target Video Resolution before encoding, so a 4000×3000 source WebP and a 640×480 source WebP produce roughly identical 3GP output if both are scaled to 320×240.

Is the converter free, and are my files private?

Yes. Conversion runs in your browser session — files are processed and downloaded without sign-up, watermark, or email. There is no per-file size cap imposed by the tool beyond what your browser can hold in memory; in practice batches of several hundred MB of WebP input convert without issue. See compress WebP if your source files are too large for your browser to handle before conversion.