Supported file formats
ConvertCove reads and writes 38 formats across four groups. Each format page explains what the format is, where it is used and what it can be converted into.
Image formats
HEIC
High Efficiency Image (HEIC/HEIF)
Apple’s default iPhone photo format; small files, limited support outside Apple devices.
Converts to: JPG, PNG, WEBP, AVIF, GIF, BMP, TIFF
JPG
JPEG image
The universal photo format. Lossy, no transparency, opens everywhere.
Converts to: PNG, WEBP, AVIF, GIF, BMP, TIFF, ICO
PNG
Portable Network Graphics
Lossless with full alpha transparency; ideal for screenshots, logos and UI.
Converts to: JPG, WEBP, AVIF, ICO, GIF, BMP, TIFF
WEBP
WebP image
Google’s web image format; lossy or lossless, with transparency and animation.
Converts to: JPG, PNG, AVIF, GIF, BMP, TIFF, ICO
AVIF
AV1 Image File Format
Next-generation format built on AV1; often half the size of JPG at the same quality.
Converts to: JPG, PNG, WEBP, GIF, BMP, TIFF
GIF
Graphics Interchange Format
256-colour format from 1987, still everywhere for simple graphics and animations.
Converts to: PNG, JPG, WEBP, AVIF, BMP, TIFF, ICO
BMP
Windows Bitmap
Uncompressed Windows bitmap. Huge files, but readable by almost any old software.
Converts to: PNG, JPG, WEBP, AVIF, GIF, TIFF, ICO
TIFF
Tagged Image File Format
Print, scanning and archiving workhorse; lossless and widely accepted by print shops.
Converts to: JPG, PNG, WEBP, AVIF, GIF, BMP
ICO
Windows Icon
Icon container holding several sizes at once; still used for favicons and Windows apps.
Converts to: PNG, JPG, WEBP, BMP
SVG
Scalable Vector Graphics
XML-based vector graphics that scale to any size; rasterise it when a pixel format is required.
Converts to: PNG, JPG, WEBP, AVIF, ICO, TIFF, BMP, GIF
Audio formats
MP3
MP3 audio
The format every player, car stereo and phone understands. Lossy, small, universal.
Converts to: WAV, M4A, FLAC, OGG, OPUS
WAV
Waveform Audio
Uncompressed PCM audio: big files, zero quality loss, accepted by every editor.
Converts to: MP3, FLAC, M4A, OGG, OPUS
M4A
MPEG-4 Audio (AAC)
AAC audio in an MP4 container; the Apple and YouTube default, better than MP3 at the same size.
Converts to: MP3, WAV, FLAC, OGG, OPUS
FLAC
Free Lossless Audio Codec
Lossless compression: roughly half the size of WAV with bit-identical sound.
Converts to: MP3, WAV, M4A, OGG, OPUS
OGG
Ogg Vorbis
Open, royalty-free lossy audio popular in games, Linux and Spotify’s back end.
Converts to: MP3, WAV, M4A, FLAC, OPUS
OPUS
Opus audio
The most efficient open audio codec; used by WhatsApp, Discord and WebRTC.
Converts to: MP3, WAV, M4A, OGG, FLAC
Video formats
MP4
MPEG-4 video
H.264 video with AAC sound: plays on every phone, browser, TV and social network.
Converts to: MP3, GIF, WEBM, MP4
MOV
QuickTime movie
Apple’s container for iPhone and camera footage, often HEVC; awkward outside Apple devices.
Converts to: MP4, WEBM, GIF, MP3
WEBM
WebM video
Open web video (VP8/VP9 + Opus) used by browsers, screen recorders and Chrome.
Converts to: MP4, GIF, MP3, WEBM
MKV
Matroska video
Flexible open container that holds any codec, many audio tracks and subtitles.
Converts to: MP4, WEBM, GIF, MP3
AVI
Audio Video Interleave
Microsoft’s 1992 video container, still common on old cameras and archives.
Converts to: MP4, WEBM, GIF, MP3
Data & documents formats
CSV
Comma-Separated Values
Plain-text table: one row per line, values separated by commas (or tabs).
Converts to: JSON, XLSX, XML, YAML
JSON
JavaScript Object Notation
The lingua franca of web APIs: nested objects and arrays in plain text.
Converts to: CSV, YAML, XML, XLSX
XML
Extensible Markup Language
Tag-based structured data used by feeds, office files and enterprise systems.
Converts to: JSON, YAML, CSV, XLSX
YAML
YAML Ain’t Markup Language
Indentation-based config format used by Docker, Kubernetes, CI pipelines and static sites.
Converts to: JSON, XML, CSV, XLSX
XLSX
Excel Workbook
Microsoft Excel spreadsheet (also reads legacy XLS and OpenDocument ODS).
Converts to: CSV, JSON, XML, YAML
HTML
HTML document
The markup language of web pages. Convert saved pages into clean Markdown.
Converts to: MD
Font formats
TTF
TrueType Font
Classic desktop font format with quadratic TrueType outlines.
Converts to: WOFF2, WOFF
OTF
OpenType Font
OpenType font, usually with CFF (PostScript) outlines; installs on any modern OS.
Converts to: WOFF2, WOFF
WOFF
Web Open Font Format
Zlib-compressed wrapper around TTF/OTF for the web; supported by every browser.
Converts to: TTF, OTF, WOFF2
WOFF2
Web Open Font Format 2
Brotli-compressed web font, typically 30% smaller than WOFF; the modern default.
Converts to: TTF, OTF, WOFF
Archive formats
ZIP
ZIP archive
The most common archive format; built into Windows, macOS and Linux.
Converts to: extract
TAR
Tape Archive
Unix archive that bundles files without compressing them.
Converts to: extract, ZIP
TAR.GZ
Gzipped TAR archive
A TAR archive compressed with gzip; the standard way to ship source code on Linux.
Converts to: extract, ZIP
7Z
7-Zip archive
High-ratio LZMA/LZMA2 archive from the open-source 7-Zip; needs an extra app on Windows and macOS.
Converts to: extract, ZIP
RAR
RAR archive
Proprietary WinRAR archive (RAR 4 and RAR 5), common for downloads and multi-part uploads.
Converts to: extract, ZIP