Reference
Supported formats
The complete and honest list of what Convertly Guru can open and what it can create, plus a straight explanation of the formats it deliberately does not handle.
What works
| Category | Files you can open | Files you can create |
|---|---|---|
| Images | JPG JPEG PNG WEBP BMP GIF SVG ICO AVIF |
JPG PNG WEBP GIF BMP ICO PDF |
| Documents | TXT MD HTML CSV JSON |
TXT MD HTML CSV JSON PDF |
| Audio | MP3 WAV OGG AAC M4A FLAC |
WAV |
| Video | MP4 WEBM MOV |
WEBM GIF PNG JPG |
What is deliberately not offered
Many converter sites advertise hundreds of formats. Almost all of those conversions run on a server, which means your file is uploaded. Every tool listed here runs on your own device instead, so the format list is shorter and everything on it genuinely works. The following are absent for concrete technical reasons.
MP3, OGG and FLAC output
Browsers ship decoders for these but no encoders. Writing one would mean a multi-megabyte encoder download or a server round trip. WAV is offered instead, because it is raw PCM that a browser can write directly.
MP4, MOV, AVI and MKV output
MediaRecorder is the only video encoder a web page can reach, and it writes WEBM. Producing other containers requires server-side transcoding.
DOCX, XLSX and PPTX
These are ZIP archives of XML with embedded fonts, styles and media. Faithful conversion needs a document engine, not a browser tab.
PDF as an input
Merging, splitting, unlocking and text extraction all need server-side PDF tooling to work across real-world documents. PDF is an output format here, not an input.
HEIC, RAW, PSD and TIFF
No browser decodes these natively, so supporting them would mean uploading your photos for conversion elsewhere.
ZIP, RAR, fonts, eBooks, CAD and 3D
Archive, font, eBook and model formats need specialised libraries and, in most cases, a server. None of them are offered.
AVIF output
AVIF images can be opened, because browsers decode them, but no browser exposes an AVIF encoder to a web page. WEBP is the closest equivalent that can be written.
OCR and AI features
Text recognition, background removal, upscaling, transcription and translation all require model inference on a server. They are not offered here.
Format questions
Why can't I convert to MP3, OGG or FLAC?
Browsers ship decoders for those formats but not encoders. There is no way for a web page to write an MP3, OGG or FLAC file without shipping a large encoder or sending your audio to a server. Since neither fits how this site works, audio output is offered as WAV only, which browsers can write natively.
Why is there no PDF merge, split or OCR?
Those operations need server-side processing to be reliable across the range of PDFs people actually have. Rather than offer a button that fails or quietly uploads your document, they are not offered here.
Why can't I convert DOCX, XLSX, HEIC or RAW files?
No browser can decode these formats natively. Supporting them would mean uploading your file for server-side conversion, which would break the guarantee that your files stay on your device.
Which browsers are supported?
Any current version of Chrome, Edge, Firefox, Safari or Opera. Video re-encoding to WEBM relies on MediaRecorder, which is most reliable in Chrome, Edge and Firefox.