- Tool: AFFLIGO Video Converter (free, 100% in-browser)
- Input: MP4, MOV, WebM, MKV, AVI, M4V, 3GP, OGV, GIF — one file at a time, up to 1GB
- Output: MP4 (H.264), WebM (VP9), MOV (H.264), GIF — or audio: MP3, WAV, OGG, OPUS, AAC, M4A, FLAC
- Controls: Video-to-Video / Video-to-Audio modes, 4 quality presets, 4 resolutions
- Privacy: no upload, no server — encoding happens on your own chip
- Rule: always convert from the original, keep the tab open until done
- What Is Video Conversion
- Which Format Should You Pick
- Top Conversions People Do
- AFFLIGO Video Converter Features
- Step-by-Step Guide
- Supported Input and Output Formats
- Extract Audio: MP3, WAV and More
- Quality Presets Decoded
- Resolution Guide
- GIF Output Rules
- Security and Privacy
- Converting on Your Phone
- When Conversion Fails: What to Do
- After Converting: Compress, Extract, Share
- Common Conversion Mistakes
- Online vs Desktop Software
- Frequently Asked Questions
What Is Video Conversion
Conversion changes the file's format or codec — compression only makes the same format smaller.
A video file is a container (MP4, MOV, MKV — the wrapper) holding codecs (H.264, VP9 for picture; AAC, Opus for sound — the actual encoding). Converting rewrites one or both: MOV to MP4 usually just re-wraps the same H.264 picture, while MP4 to WebM re-encodes it as VP9. That is why some conversions are fast and lossless-feeling and others take real encoding time.
Know which job you have: a file that won't play or upload somewhere needs conversion. A file that plays fine but is too big to send needs the Video Compressor instead. Picking the wrong tool is the most common time-waster — converting a 500MB file to another 500MB format fixes nothing about its size.
While preparing this guide I converted an iPhone MOV sample to MP4 and extracted its audio to MP3: both outputs played back identically in VLC and Chrome, and the MP3 carried the full track with no truncation.
Which Format Should You Pick
Pick by where the file is going, not by habit.
| Output | Pick it when | Watch out |
|---|---|---|
| MP4 (H.264) | Sharing with people — plays on every phone, TV, editor, and platform | Slightly larger than WebM at equal quality |
| WebM (VP9) | Embedding on your own website — usually smaller at the same quality | Poor playback on Apple devices and some editors |
| MOV (H.264) | Handing footage to Apple workflows — Final Cut, iMovie, Mac editors | Rejected by many Windows apps and web uploaders; convert to MP4 for sharing |
| MP3 / audio | You only need the sound — podcast clip, lecture, music, voiceover | Picture is discarded permanently; keep the video if you might need it |
| GIF | Autoplaying loops where video is rejected (docs, forums, chats) | No sound, huge files — short clips only |
Default answer for 9 out of 10 jobs: MP4. It is the only format that plays essentially everywhere without explanation.
Top Conversions People Do
Find your exact job — every one below runs in the converter with the same 4 steps.
| Conversion | Why people do it | Tool setting |
|---|---|---|
| MOV to MP4 | iPhone and Mac recordings won't play on Windows, Android, or TVs | Video to Video, MP4 output |
| MP4 to WebM | Smaller files for embedding video on a website | Video to Video, WebM output |
| MKV to MP4 | Downloads and rips that phones and editors refuse to open | Video to Video, MP4 output |
| WebM to MP4 | Screen recordings and web clips that Apple devices won't play | Video to Video, MP4 output |
| AVI to MP4 | Old camera and capture files in a legacy container | Video to Video, MP4 output |
| Video to MP3 | Keep just the sound — interviews, lectures, music | Video to Audio mode, MP3 |
| Video to GIF | Short silent loop for docs, chats, and forums | Video to Video, GIF output, short clip |
| GIF to MP4 | GIF too heavy for WhatsApp, Discord, or social upload | Upload GIF, MP4 output |
AFFLIGO Video Converter Features
Two modes, eleven outputs, one preview player — the no-upload bench that covers MOV-to-MP4 through video-to-MP3.
Two Convert Modes
Video to Video switches containers and codecs (MP4, WebM, MOV, GIF). Video to Audio discards the picture and extracts the soundtrack in 7 audio formats.
11 Output Formats
MP4 (H.264), WebM (VP9), MOV (H.264), and animated GIF for video — plus MP3, WAV, OGG, OPUS, AAC, M4A, and FLAC for audio extraction.
4 Quality Presets
Low (smallest), Medium (balanced default), High (detail-preserving), and Lossless (largest). Video bitrate scales with resolution; audio maps to 96–320 kbps.
Resolution Downscale
Keep Original, or scale to 720p, 480p, or 360p during conversion. Downscaling while converting shrinks the result in the same pass.
Original vs Converted Preview
A single player flips between your input and the result — video, GIF, or audio — so you can verify the conversion before downloading.
Live Progress and Stats
A progress ring shows live encoding percentage with file status, Cancel any time. The done card reports Original, Converted, and Format.
Step-by-Step Guide
Drop the file, pick Video-to-Video or Video-to-Audio, set quality, convert, preview both — one file at a time.
Upload Your Video
Open affligo.com/convert-video. Drag and drop your file into the upload zone, press Ctrl+V to paste, or import from Google Drive or Dropbox. One file at a time, up to 1GB — the dropzone shows your device's exact cap.
Choose Mode and Settings
Pick Video to Video for MP4, WebM, MOV, or GIF — or Video to Audio for MP3, WAV, OGG, OPUS, AAC, M4A, FLAC. Then set quality (Medium for most jobs) and resolution (Original or 720p).
Convert
Click Convert Video and keep the tab open — leaving stops the run. The progress ring shows live encoding percentage. Cancel returns you to settings any time.
Preview and Download
Flip between Original and Converted previews, check the Original / Converted / Format stats, then click Download Video. The file saves as name-converted.ext. Use Reprocess or Convert Another for the next file.
Supported Input and Output Formats
Drop in practically anything your camera, phone, or screen recorder produces:
| Direction | Formats |
|---|---|
| Input | MP4, MOV, WebM, MKV, AVI, M4V, 3GP, OGV, GIF |
| Video output | MP4 (H.264), WebM (VP9), MOV (H.264), animated GIF |
| Audio output | MP3, WAV, OGG, OPUS, AAC, M4A, FLAC |
Phone footage (MP4, MOV), downloads (MKV, AVI), and old clips (3GP, M4V, OGV) all work. GIF input converts to MP4, WebM, or MOV video — but GIF to audio is blocked, because GIFs carry no sound.
Extract Audio: MP3, WAV and More
Switch to Video to Audio mode and the video track is discarded — only sound is converted.
The tool reads your video's audio track and re-encodes it straight into the format you pick. Two honest limits: a video with no audio track (silent screen recordings, muted clips, GIFs) fails with a clear message instead of a silent file — and WAV needs no encoder, so it works in every browser even when MP3 or AAC refuse.
| Format | Pick it when | Quality mapping |
|---|---|---|
| MP3 | Universal sharing — plays everywhere, small files | Low 96 / Medium 192 / High 320 kbps |
| AAC / M4A | Apple devices, iTunes, better quality per byte than MP3 | Low 96 / Medium 192 / High 320 kbps |
| WAV | Editing or maximum compatibility — works in any browser | Lossless, uncompressed |
| FLAC | Archiving music with zero quality loss at half the size of WAV | Lossless, compressed |
| OGG / OPUS | Web playback and voice — Opus is the best voice codec per byte | Low 96 / Medium 192 / High 320 kbps |
Saving audio for a podcast or ringtone? Medium (192 kbps) is transparent for most ears. Need deeper audio editing options? Continue in the Audio Converter.
Quality Presets Decoded
Each preset sets a bitrate target that scales with your output resolution, so Medium stays sensible whether you export at 360p or Original. There is no exact-target-size mode — pick the preset that fits your destination:
| Preset | Result | Use when |
|---|---|---|
| Low | Smallest file | Chat apps, messaging, quick previews where compatibility matters more than fidelity |
| Medium (default) | Balanced | Almost everything — start here |
| High | More detail kept | Text-heavy screen recordings, presentations, portfolio clips |
| Lossless | Largest file | Archiving only — defeats the purpose of converting for sharing |
For audio outputs the same presets map to bitrates: Low 96 kbps, Medium 192 kbps, High and Lossless 320 kbps — while WAV and FLAC stay lossless regardless of preset.
Resolution Guide
Resolution only appears in Video to Video mode — audio extraction has no picture to scale. Downscaling during conversion shrinks the result in the same pass:
| Setting | Width | Use when |
|---|---|---|
| Original | Unchanged | Quality matters most; keep every pixel |
| 720p | 1280px | General sharing — the sweet spot for most conversions |
| 480p | 854px | Messaging apps, email, tight caps |
| 360p | 640px | Smallest possible file; acceptable for previews |
Two limits to know: converting up in resolution never adds detail — a 480p source stays 480p-sharp inside a bigger frame. And GIF output caps width at 640px no matter what you pick.
GIF Output Rules
GIF trades motion efficiency for universal autoplay — convert it only for compatibility, not for size.
The tool captures up to 100 frames at 10fps — about 10 seconds of smooth motion — capped at 640px wide. Longer clips are sampled across their full length, so motion turns sparse. Going the other way, a GIF converts back to a short 2-second video clip at 10fps.
GIF fits silent loops under ~10 seconds for READMEs, docs, or chats. Anything with a soundtrack, anything longer, anything headed to WhatsApp or Discord — output MP4 instead, usually 5–10x lighter. And never convert GIF to audio: GIFs have no soundtrack.
Security and Privacy
Most web converters send your file to a remote server and queue it there. AFFLIGO converts on the same device that holds the file — the MediaBunny engine re-encodes locally in your browser, so videos never leave your machine. No account, no storage on our side, no deletion window to wait for. Closing the tab wipes the session.
That keeps unreleased edits, client clips, and family footage off third-party servers. One file converts at a time, up to 1GB (your device's exact cap shows on the dropzone). Offline check: convert once, disconnect, convert again — the second run still completes.
Converting on Your Phone
The single most common phone conversion is iPhone MOV to MP4 — your iPhone records MOV by default, and half the world can't open it. Open the converter in your mobile browser, upload from Files or Gallery, pick MP4, and convert. Android users hit the mirror problem with WebM screen recordings that iPhones reject — same fix, opposite direction.
Phone rule of thumb: leave this tab visible until the done card appears (a backgrounded tab can stall the encode), and trim before converting — a 30-second status clip finishes in a fraction of the time of a 5-minute recording.
When Conversion Fails: What to Do
Every error message tells you the fix — here is the full list.
| Message | Meaning | Fix |
|---|---|---|
| Browser can't encode H.264 / VP9 | Your browser lacks that codec's encoder | Try Chrome, or switch format — WebM if MP4 fails, MP4 if WebM fails |
| No audio track found | Silent video, muted clip, or GIF has no sound | Convert to a video format instead; use a source with sound |
| Browser can't decode this audio | Exotic source audio your browser can't read | Try Chrome |
| Browser can't encode audio — try WAV | Encoder missing for MP3/AAC in this browser | Pick WAV output, which needs no encoder |
| File is already a GIF | GIF-to-GIF output selected | Pick MP4, WebM, or MOV instead |
| Cannot read video / unsupported codec | Corrupt file or codec nothing on the device decodes | Try another player to verify the file; re-export the source |
| Exceeds 1GB / device cap | File over your device's per-file limit | Trim or compress the file first, then convert |
| Conversion cancelled / tab left | Run stopped — encoding needs the open tab | Re-run and keep the tab foregrounded |
One surprise to know: converting GIF to MP4 can download as .webm if your browser can't record MP4 — the tool completes the job in the closest working format instead of failing. The file still plays fine in modern browsers.
After Converting: Compress, Extract, Share
Right format but still too big? Need the audio separately? Shrink something else next? Continue without uploading anywhere:
Shrink the Result
Use the Video Compressor to squeeze a converted MP4 or WebM under email, Discord, or WhatsApp caps.
Edit the Audio Further
Need just the soundtrack in another codec? The Audio Converter converts between MP3, WAV, FLAC, and more — all in-browser.
Bundle the Rest
Still images go through the Image Compressor and PDFs through Compress PDF — handy when one email carries video plus attachments.
Common Conversion Mistakes
Converting Instead of Compressing
A 500MB file converted to another format is still ~500MB. Too big to send means compressor; won't play means converter.
Re-converting the Output
Each generation throws away more data and snowballs artifacts. Always go back to the original and change one setting instead.
Hoping GIF Saves Bytes
A GIF stores nearly every frame, so the same seconds as MP4 weigh about 10x more. Pick GIF for autoplay-only spots, never to shrink a file.
Upscaling for "HD"
Converting 480p to 720p never adds detail — it just wraps the same soft picture in a bigger frame. Keep the source resolution or downscale.
Leaving Mid-Encode
Navigate away and the encode halts. Let long clips run with this tab visible until the done card shows.
Online vs Desktop Software
Installed encoders (HandBrake, FFmpeg, Premiere) expose exact bitrates, two-pass runs, and HDR chains — at the cost of setup, learning time, and a machine strong enough for 4K.
A browser converter wins on speed-to-done for everyday jobs: no install, a few controls, results in minutes on any device, private by design. Rule of thumb: quick format switches, phone clips, and audio extraction belong in the browser; film masters and HDR pipelines belong on the desktop.
Frequently Asked Questions
Drop your video into AFFLIGO's Video Converter, keep Video to Video mode, select MP4 (H.264) as output, pick quality and resolution, and hit Convert Video. The file is re-encoded 100% in your browser — no upload, no signup — and you download the MP4 when it finishes.
Upload the MOV file, select MP4 output, and convert. iPhone and Mac recordings are usually already H.264 inside a MOV wrapper, so converting to MP4 keeps the same quality while making the file play on Windows, Android, TVs, and every platform that rejects MOV.
Upload the MP4, select WebM (VP9) output, and convert. WebM re-encodes with the VP9 video codec and Opus audio, which usually lands smaller than MP4 at the same visual quality — ideal for embedding video on your own website.
Yes. Upload the MKV or AVI file and select MP4 output. These containers often hold streams your browser and phone cannot play directly, so converting to MP4 (H.264) makes downloads, screen recordings, and camera files playable everywhere.
Switch to Video to Audio mode, choose MP3, and click Convert Video. The tool reads the video's audio track and converts it to MP3 in your browser. If the video has no audio track, the tool tells you instead of producing a silent file.
Pick MP3 for universal sharing and small files, AAC or M4A for Apple devices, WAV or FLAC when you need lossless quality for editing or archiving. OGG and OPUS suit web playback. Quality setting maps to bitrate: Low 96 kbps, Medium 192 kbps, High and Lossless 320 kbps.
Select GIF (Animated) as output and convert. The tool captures up to 100 frames at 10fps — about 10 seconds of smooth motion — capped at 640px wide. Keep clips short and silent; GIF has no sound and files grow fast.
Changing containers with the same codec keeps quality, but re-encoding always discards some data. At Medium quality with matching resolution the difference is hard to see in normal playback. Always convert from the original file, never from a previous conversion, to avoid snowballing artifacts.
Start with Medium quality and Original or 720p resolution — the right balance for most conversions. Use High when detail must survive, Low for the smallest file, and Lossless only for archiving. Downscaling to 720p or 480p also shrinks the result substantially.
Input: MP4, MOV, WebM, MKV, AVI, M4V, 3GP, OGV, and GIF — one file at a time, up to 1GB (your device's exact cap shows on the dropzone). Output: MP4 (H.264), WebM (VP9), MOV (H.264), animated GIF, or audio in MP3, WAV, OGG, OPUS, AAC, M4A, FLAC.
No upload happens — conversion runs entirely in your browser with the MediaBunny engine, so files never leave your device. The tool is completely free: no signup, no watermark, unlimited files one at a time.
Your browser lacks the hardware or software encoder for that codec. The fix is in the message: try Chrome, or switch output format — pick WebM if MP4 fails, or MP4 if WebM fails. For audio, WAV always works since it needs no encoder.
The video genuinely has no audio — silent screen recordings, GIFs, and muted clips carry no soundtrack to extract. GIF input to audio output is blocked for the same reason. Convert to a video format instead, or use a source file that contains sound.
Video Converter changes formats (MP4, WebM, MOV, GIF) and extracts audio (MP3, WAV, and more). Video Compressor keeps the format and shrinks the file size. Need a different format — converter. Need a smaller file — compressor.
Yes, until you verify the output. Keep originals for re-edits at full quality and treat the converted file as the sharing copy — re-converting a converted file stacks quality loss.
Want to explore more?
Key Takeaways
- Won't play means converter, too big to send means compressor — pick the right tool first
- MP4 for sharing with people, WebM for your own website, MOV for Apple editors, MP3 when you only need sound
- Start with Medium quality and Original or 720p; High for detail, Low for smallest file, Lossless for archive only
- Always convert from the original, never from a previous conversion — generations snowball artifacts
- GIF means short and silent: 100 frames at 10fps, 640px cap; GIFs have no audio to extract
- Silent or muted videos fail audio extraction honestly — use a source with sound
- Keep the tab open until the download lands — backgrounding the tab can stall the encode
