IMG
Image converter
JPG, PNG, WEBP, GIF, BMP, ICO, SVG and AVIF in. JPG, PNG, WEBP, GIF, BMP, ICO or PDF out, with resize, rotate and quality control.
Convert images →Browser-based file tools
Convert and compress files without uploading them
Convertly Guru runs every conversion inside your own browser. Drop in an image, document, audio file or video, pick an output format, and download the result. Nothing is sent to a server, nothing is stored, and there is no account to create.
Free no sign-up
Private files never leave your device
Unlimited no watermarks
Drop a file to start converting.
The converter needs JavaScript, because the conversion itself runs on your own device rather than on a server. Enable JavaScript to load it.
Choose a converter
Each tool below is a working, in-browser converter. Only formats that browsers can genuinely read and write are listed, so nothing here will hand you a dead end or quietly upload your file.
VID
Video converter
Turn MP4, MOV or WEBM into a smaller WEBM, an animated GIF, or a single extracted frame as PNG or JPG.
Convert video →AUD
Audio converter
Decode MP3, OGG, AAC, M4A or FLAC and export uncompressed WAV, with trimming and volume adjustment.
Convert audio →DOC
Document converter
Move between TXT, Markdown, HTML, CSV and JSON, or typeset any of them onto an A4 PDF.
Convert documents →Compress files
IMG
Compress images
Re-encode JPG and WEBP at a lower quality, or scale the pixel dimensions down. The size saving is shown next to each result.
Compress images →VID
Compress video
Re-encode to WEBM at a lower bitrate, drop the resolution to 720p or 480p, reduce the frame rate, trim the clip or strip the audio track.
Compress video →How it works
- 1
Add your file
Drag a file onto the drop zone, click to browse, or paste from the clipboard. You can queue several at once.
- 2
Pick a format
Only formats your browser can actually produce are offered. Open Settings to adjust quality, size, trim points and more.
- 3
Download
Conversion happens on your device, then the finished file is offered as a normal download.
What Convertly Guru supports
The table below is the honest, complete list. If a format is not here, it is because browsers cannot handle it without a server.
| 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 |
Frequently asked questions
Are my files uploaded to a server?
No. Every conversion runs inside your browser tab using the Canvas, Web Audio and MediaRecorder APIs that are built into the browser itself. Your file is read into memory, converted, and offered back to you as a download. It is never transmitted anywhere, and nothing is written to disk or to any storage service.
Do I need an account?
No. There is no sign-up, no email address and no login. Open the page, drop a file, download the result.
Is there a file size limit?
There is no artificial limit. The practical ceiling is your device's available memory, because the whole file is held in RAM while it converts. Very large video files are the most demanding.
Does it work offline?
Yes, once the page has loaded. Because no server is involved in the conversion, you can disconnect and the tools keep working.
Are there watermarks or usage caps?
No. Output files are unmodified, and you can convert as many files as you like.
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.