File converter
Convert images, audio, video and PDF files right here in the browser. Your files never leave your device.
Most used
- FileHEIC → JPGTurn iPhone HEIC photos into universally supported JPG.
- FilePNG → JPGShrink PNG images into smaller JPG files.
- FileMP4 → MP3Extract the soundtrack from MP4 video as MP3 audio.
- FileJPG → PNGConvert JPG images to lossless PNG.
- FilePDF → JPGTurn every page of a PDF into a separate JPG image.
- FileMOV → MP4Re-encode MOV video to MP4 in your browser.
- FileWEBP → PNGConvert WEBP images to lossless PNG.
- FileJPG → PDFCombine JPG images into a single PDF document.
- FileM4A → MP3Convert M4A audio to MP3 in your browser.
- FileWEBP → JPGConvert WEBP images to JPG in your browser.
- FileMKV → MP4Re-encode MKV video to MP4 in your browser.
- FileWAV → MP3Compress WAV audio into smaller MP3 files.
- FilePNG → WEBPShrink PNG images into smaller WEBP files.
- FileFLAC → MP3Compress FLAC audio into smaller MP3 files.
- FileSVG → PNGRasterise SVG vectors to PNG at any size.
- FileMP4 → WEBMRe-encode MP4 video to WEBM in your browser.
Image converters
Photos, screenshots and graphics — iPhone HEIC, vector SVG, modern AVIF and the everyday PNG, JPG and WEBP.
HEIC — High Efficiency Image Container
PNG — Portable Network Graphics
JPG — JPEG image
WEBP — WebP image
SVG — Scalable Vector Graphics
AVIF — AV1 Image File Format
GIF — Graphics Interchange Format
BMP — Windows Bitmap
Audio converters
Music, voice memos and recordings — from lossless FLAC and WAV down to compact MP3, M4A and Opus.
M4A — MPEG-4 Audio (AAC)
WAV — Waveform Audio
FLAC — Free Lossless Audio Codec
MP3 — MPEG Audio Layer III
OGG — Ogg audio
Video converters
Clips and screen recordings — swap container, re-encode, or pull the soundtrack out as an audio file.
MP4 — MPEG-4 video
- FileMP4 → MP3Extract the soundtrack from MP4 video as MP3 audio.
- FileMP4 → WEBMRe-encode MP4 video to WEBM in your browser.
- FileMP4 → MOVRe-encode MP4 video to MOV in your browser.
- FileMP4 → MKVRe-encode MP4 video to MKV in your browser.
- FileMP4 → WAVExtract the soundtrack from MP4 video as WAV audio.
- FileMP4 → M4AExtract the soundtrack from MP4 video as M4A audio.
- FileMP4 → OGGExtract the soundtrack from MP4 video as OGG audio.
- FileMP4 → OPUSExtract the soundtrack from MP4 video as OPUS audio.
- FileMP4 → FLACExtract the soundtrack from MP4 video as FLAC audio.
MOV — QuickTime movie
- FileMOV → MP4Re-encode MOV video to MP4 in your browser.
- FileMOV → WEBMRe-encode MOV video to WEBM in your browser.
- FileMOV → MKVRe-encode MOV video to MKV in your browser.
- FileMOV → MP3Extract the soundtrack from MOV video as MP3 audio.
- FileMOV → WAVExtract the soundtrack from MOV video as WAV audio.
- FileMOV → M4AExtract the soundtrack from MOV video as M4A audio.
- FileMOV → OGGExtract the soundtrack from MOV video as OGG audio.
- FileMOV → OPUSExtract the soundtrack from MOV video as OPUS audio.
- FileMOV → FLACExtract the soundtrack from MOV video as FLAC audio.
MKV — Matroska video
- FileMKV → MP4Re-encode MKV video to MP4 in your browser.
- FileMKV → WEBMRe-encode MKV video to WEBM in your browser.
- FileMKV → MOVRe-encode MKV video to MOV in your browser.
- FileMKV → MP3Extract the soundtrack from MKV video as MP3 audio.
- FileMKV → WAVExtract the soundtrack from MKV video as WAV audio.
- FileMKV → M4AExtract the soundtrack from MKV video as M4A audio.
- FileMKV → OGGExtract the soundtrack from MKV video as OGG audio.
- FileMKV → OPUSExtract the soundtrack from MKV video as OPUS audio.
- FileMKV → FLACExtract the soundtrack from MKV video as FLAC audio.
WEBM — WebM video
- FileWEBM → MP4Re-encode WEBM video to MP4 in your browser.
- FileWEBM → MOVRe-encode WEBM video to MOV in your browser.
- FileWEBM → MKVRe-encode WEBM video to MKV in your browser.
- FileWEBM → MP3Extract the soundtrack from WEBM video as MP3 audio.
- FileWEBM → WAVExtract the soundtrack from WEBM video as WAV audio.
- FileWEBM → M4AExtract the soundtrack from WEBM video as M4A audio.
- FileWEBM → OGGExtract the soundtrack from WEBM video as OGG audio.
- FileWEBM → OPUSExtract the soundtrack from WEBM video as OPUS audio.
- FileWEBM → FLACExtract the soundtrack from WEBM video as FLAC audio.
Document converters
Turn every page of a PDF into an image, turn images into a PDF, or merge several PDFs into one.
Private by design — no upload, no sign-up
ConverterStack converts files locally, using your own browser. Your files are never uploaded to a server, so they stay on your device from start to finish.
- Are my files uploaded to a server?
- No. Every conversion runs locally in your browser using your own device's CPU. Your files are never uploaded, never transmitted over the network and never stored on a server.
- Is there a file size limit?
- There is no imposed limit, because nothing is uploaded. The practical ceiling is your device's available memory, so very large video files may be slower on older hardware.
- Does it work offline?
- Yes. Once the page has loaded, file conversion keeps working without a network connection, since the conversion happens entirely on your device.
- Do I need to sign up or install anything?
- No. There is no sign-up, no account and no software to install. Open the page, pick a file and convert.
- Is it free?
- Yes, all conversions are free to use, with no watermarks and no daily quota.