It reads the file, so you only pick the result
Add a file and the converter checks what it is, then lists only the formats that file can become. You never scroll past options that would fail.
Free online file converter
Add a file and pick what it should become. 5,967 conversions across images, documents, video and audio, with no signup.
Popular conversions
Start from the file you have.
The conversions people look for most, grouped by file type.
Images
Phone photos, web images and scans.
- HEIC to JPGiPhone photos that open on any device
- AVIF to JPGWeb images for apps that cannot read AVIF
- WEBP to JPGSaved web images you can edit and share
- JPG to PNGLossless copies for editing and design work
- SVG to PNGVector artwork as a fixed-size image
- JPG to PDFPhotos and scans as one document
- PDF to JPGEach PDF page as an image
Documents
Office files, PDFs, web pages and ebooks.
Video
Camera and screen recordings, into MP4.
How it works
Three steps, one page.
Add your files
Drop them on the box, or bring them in from your device, Google Drive, Dropbox or a link.
Pick the format
The converter reads each file's type and lists the formats it can become.
Convert and download
Each file shows its own status. Download the result when it finishes.
Why indox
One converter for every file you have.
Different files, one list
Add a photo, a spreadsheet and a video together and choose a format for each one. Every file shows its own status and has its own download.
Bring files from where they already are
Drop files on the box, choose them from your device, or import them from Google Drive, Dropbox or a link. It runs in the browser, so there is nothing to install.
Format guide
Which format should you pick?
The right format depends on where the file goes next. Start from what you need it to do.
Images
JPG to share, PNG to edit, PDF to send several as one file.
| Format | Best for | Keep in mind |
|---|---|---|
| JPG | Photos you share, upload or email | Small files, but no transparency, and each save loses a little detail |
| PNG | Screenshots, logos and images you will edit | Keeps every pixel and transparency; files are larger than JPG |
| WEBP | Images on a website | Smaller than JPG at similar quality; some older apps cannot open it |
| HEIC | Photos kept on an iPhone | About half the size of JPG, but many Windows and web apps cannot read it |
| AVIF | Web images where size matters most | Very small files; support outside browsers is still limited |
| SVG | Logos and icons that must scale | Stays sharp at any size; it holds drawings, not photos |
Documents
PDF to send or print, DOCX or XLSX to keep editing.
| Format | Best for | Keep in mind |
|---|---|---|
| Files you send, print or archive | Looks the same on every device; hard to edit | |
| DOCX | Text you still need to edit | Opens in Word, Google Docs and Pages; layout can shift between apps |
| XLSX | Spreadsheets with formulas and several sheets | Keeps formulas and formatting; needs a spreadsheet app |
| CSV | Moving table data between systems | Plain text any tool can read; one sheet, no formulas or styling |
| HTML | Content for a web page | Opens in any browser; images and styles may sit in separate files |
| EPUB | Books read on a phone or e-reader | Text reflows to fit the screen, so page numbers are not fixed |
Video
MP4 plays almost everywhere, so it is the usual target.
| Format | Best for | Keep in mind |
|---|---|---|
| MP4 | Sharing, uploading and playback on any device | The safest choice; quality depends on the settings it was made with |
| MOV | Editing on a Mac or iPhone | High quality from Apple cameras; large, and less at home on Windows |
| MKV | Films with several audio tracks or subtitles | Holds almost anything; many phones and TVs will not play it |
| WEBM | Video embedded in a web page | Small and open; editors and Apple devices support it poorly |
| AVI | Older Windows software and cameras | Widely known but dated; files are large for their quality |
Audio
MP3 for listening, WAV for editing.
| Format | Best for | Keep in mind |
|---|---|---|
| MP3 | Music and voice on any player | Small files; some detail is removed and cannot be restored |
| WAV | Recording and editing | Full, uncompressed quality; about ten times the size of MP3 |
| M4A | Apple devices and voice memos | Better quality than MP3 at the same size; less universal |
| OGG | Games, apps and open-source tools | Open and efficient; many car and phone players skip it |
Limits
What you can convert, and how much.
File size
Your current limit is shown under the upload box. Signing in raises it, and paid plans raise it further.
Free use
You get free credits every day with no account and no card. Paid plans add more volume.
Formats
5,967 conversions across images, documents, video, audio, ebooks and fonts. A format a file cannot become is never offered.
Devices
The converter runs in the browser on a phone, tablet or computer. There is no app to install.
Worth knowing before you convert
- A scanned PDF is a picture of text. Without OCR there is no text to move into Word or Excel.
- Converting to a smaller format, such as WAV to MP3 or PNG to JPG, removes detail that converting back cannot restore.
- Copy-protected ebooks, music and video cannot be converted.
- Fonts that are not embedded in a document are replaced, which can move line breaks.
What happens to a file you upload?
A file stays on indox only as long as the conversion needs it. It travels over an encrypted connection, it is converted on indox infrastructure, and files uploaded on the free tier are deleted automatically within 24 hours.
Upload
Encrypted in transit
Convert
Processed on indox infrastructure
Download
Your result, when the job finishes
Deleted
Free-tier files, within 24 hours
Signed in? Your output stays in your history for your plan's retention period.
Free to start, more when you need it.
Free
- All converters
- Daily credit refresh
- Email support
Basic
- Access to all features
- AI Extract & Doc Chat
- Priority conversions
- Email support
Highest priority
Premium
- Everything in Basic
- Highest priority queue
- Larger file limits
- Priority support
Pay-As-You-Go
- No subscription
- Credits never expire
- Opt-in auto-refill
- Access to all features
When converting is not the whole job.
Guides and API docs.
Questions
Before you convert a file.
How does the converter know what my file is?
It reads the file's type when you add it, then lists only the formats that file can become. indox supports 5,967 conversions in total.
Can I convert more than one file at a time?
Yes. Add several files to the same list and choose a format for each one. They do not have to be the same type.
Which format should I choose?
Choose by where the file goes next: JPG or MP4 to share, PDF to send or print, and PNG, DOCX or WAV to keep editing. The format guide on this page compares each one.
Will converting lower the quality?
It depends on the format you pick. Going to a smaller format, such as PNG to JPG or WAV to MP3, removes some detail to save space. Going the other way keeps what the file already has, but cannot bring back what was removed.
Does it work on a phone?
Yes. The converter runs in the browser on iPhone, Android, tablets and computers, so there is no app to install.
How long does a conversion take?
Most images and documents finish in seconds. Long videos and large files take longer, and each file shows its own status while it runs.
Why can a file not be converted?
The usual causes are a damaged file, copy protection, or a size over your limit. The converter shows a message on the file that failed.
Is indox free to use?
Yes, to start. You get free credits every day with no account and no card. Paid plans add more volume, batch jobs and the API.
Do I need to sign up or install anything?
No. indox runs in your browser, so there is nothing to install, and you can convert or edit a file as a guest. Signing in raises your upload limit and keeps your history.
What happens to my files after I upload them?
Files are encrypted in transit. Files uploaded on the free tier are deleted automatically within 24 hours.
How large a file can I upload?
The limit for your account is shown under the upload box on this page. Signing in gives you a higher limit than a guest gets.
Is there an API for developers?
Yes. One REST API runs every tool on this site: send a file, poll the job, download the result. The free tier needs no key.