Drop a file and get a PDF
Drop a file on the box, or choose one. The box checks the file type and converts it to PDF. The PDF keeps your file's base name.
Free PDF converter
Drop a file to convert
or choose a file, we detect the type and pick the best output
Free · up to 2 GB · encrypted · auto-deleted within 24 hours
A PDF converter changes a document into a PDF. Add a Word, Excel, PowerPoint, OpenDocument, RTF, text, CSV, HTML or Markdown file and you get a PDF back. This box makes PDFs only, so it refuses PDFs and images. Drop a file in the box above and download the result. A single conversion needs no account, files are encrypted in transit, and free-tier files are deleted within 24 hours.
Why use indox to convert PDF files?
One output, one file
The box converts to PDF only and offers no other target, so there is no format to pick. It takes one file per run: the first file you pick.
See progress while it runs
The conversion starts as soon as you pick the file, and the box shows the file name while it runs. If a job takes longer than usual, the page says so and the job keeps running.
Download it, share it or convert another
When the job finishes you can download the new file, copy a link to it or start another conversion. A clear message appears if a file type is not supported.
What the converter keeps and what it changes
Stays the same
- Your original file on your device. The box uploads a copy.
- The file's base name. report.docx comes back named report.pdf.
Changes
- The format. The box asks for a PDF and offers no other target.
- The size on the finished card is the size of your source file, not of the new PDF.
- One file per run. The box takes the first file you pick.
How do I convert a file with indox?
Upload
Drop your file on the box or choose it from your device. It accepts doc, docx, odt, rtf, txt, ppt, pptx, odp, xls, xlsx, ods, csv, html, htm and md files.
Convert
The conversion to PDF starts as soon as you add the file. There is no output format to choose.
Download
Download the PDF when the job finishes. It is encrypted in transit, and free-tier files are deleted within 24 hours.
What do I get from indox's PDF converter?
One box turns common document files into PDF, so you do not need a different site for each type. It converts to PDF only: it does not turn a PDF into another format and does not accept images.
- Office, OpenDocument, RTF, text, CSV, HTML and Markdown files become PDF
- The output is always a PDF, so there is no format to pick
- The PDF keeps your file's base name
- No account needed for a single conversion
- Free-tier files are deleted within 24 hours
What are the limits of the PDF converter?
- Size
- The upload box shows the size limit before you add a file.
- Formats
- Word, Excel, PowerPoint, OpenDocument, RTF, TXT, CSV, HTML and Markdown files convert to PDF. PDFs and images are not accepted here.
- Privacy
- Files are encrypted in transit and processed on indox infrastructure.
- Deletion
- Free-tier files are deleted automatically within 24 hours after the job finishes. Signed-in output stays in your history for your plan's retention period.
Limits worth knowing
- The file type is read from the ending of the file name, so a document saved as .pages or .key is refused.
- One file per run. The box takes the first file you pick.
- The size on the finished card is the size of your source file, not of the new PDF.
When the converter does not accept or finish a file
| What you see | Why | What to do |
|---|---|---|
| The box says the file type is not supported | It accepts document files only: doc, docx, odt, rtf, txt, ppt, pptx, odp, xls, xlsx, ods, csv, html, htm and md. A PDF or an image is refused | Turn an image into a PDF with JPG to PDF, or a PDF into a Word file with PDF to Word. |
| A file with an uncommon extension is refused | The check goes by the ending of the file name, so a document saved as .pages or .key does not pass | Export it from its own app as docx, pptx or xlsx, then add that file. |
| The page says it is still converting | The job kept running after the page stopped waiting. That is not a failure | The job keeps running. Wait a moment, then check your conversions. |
| The size on the finished card looks the same as before | The card shows the size of the file you added, not the size of the PDF | Look at the size of the downloaded PDF on your device. |
What do the free and paid plans add?
Free
- All converters
- Daily credit refresh
- Email support
Basic
- Access to all features
- AI Extract
- 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
Which other conversions and PDF tools can I use?
The conversion catalog lists each supported pair for documents and media. Open one to convert a file on its own page.
Open the conversion catalogConvert to PDF
7 conversionsWord → PDFDOC and DOCX into pixel-perfect, shareable PDF.Excel → PDFXLS and XLSX spreadsheets laid out as PDF.PowerPoint → PDFPPT and PPTX decks into a fixed PDF.JPG → PDFCombine one or more JPGs into a PDF.PNG → PDFTurn PNG images into a clean PDF page.HTML → PDFRender web pages and HTML files to PDF.TXT → PDFWrap plain text files into a styled PDF.
Convert from PDF
6 conversionsWho can use a PDF converter?
People who send documents that must not change
Turn a Word, Excel or PowerPoint file into a PDF so you send one fixed file.
People who share sheets and notes
Turn an Excel sheet, a CSV, a text file or a Markdown file into a PDF you can send.
Anyone with a web page to keep
Save an HTML file as a PDF to archive it or send it.
Where can I read more?
Sources
- OOXML Format Family -- ISO/IEC 29500 and ECMA 376Library of Congress
- HyperText Markup Language (HTML) Format FamilyLibrary of Congress
Facts checked on October 16, 2026
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PDF converter FAQs
Is the indox PDF converter free?
Yes. A single conversion needs no credit card. Paid plans are for high-volume or API usage.
Do I need to create an account to convert a PDF?
No. You can convert a file without signing up. An account is never required to run a single conversion.
Are my files secure and private?
Every upload is encrypted in transit over HTTPS and processed on indox infrastructure. Free-tier files and their outputs are deleted automatically within 24 hours after conversion.
Does the converter keep my file's name?
Yes. The base name stays the same. report.docx comes back named report.pdf.
What is the largest PDF I can convert?
The upload box shows the size limit before you add a file.
Can I convert PDF to Word here?
No. This box only makes PDFs. Use the PDF to Word page for that direction.
Which formats can I convert to and from PDF?
doc, docx, odt, rtf, txt, ppt, pptx, odp, xls, xlsx, ods, csv, html, htm and md files convert to PDF. PDFs and images are refused.
Can I convert a scanned PDF or an image?
Not in this box, which refuses PDFs and images. Use the JPG to PDF page for an image, and OCR PDF to make a scanned PDF searchable.
Can I run conversions from code?
Yes. The same engine is available as a REST API. The docs quickstart shows how to authenticate, start a conversion, poll it and download the result.