Think CONVERT Files stay on this device
Never uploadedSpreadsheets, contacts, documents and routes are converted inside your browser. We never see them.
Free, with no limitsNo account, no daily limit, no file-size cap. As many files as you like.
Works on phones, and offlineiPhone, Android and computers, even without a connection once loaded.

Most used

All tools

131 converters for the files people use every day.

Spreadsheets and CSV

11 tools

JSON, XML and YAML

16 tools

Fonts

5 tools

Documents

13 tools

Office files

10 tools

Ebooks

9 tools

Subtitles

9 tools

Contacts and calendars

8 tools

Email files

7 tools

GPS and maps

10 tools

Archives

5 tools

3D models

17 tools

2D to 3D

5 tools

CAD drawings

6 tools

More from Think

Sister sites

Other converters upload your files. This one can't.

Customer lists, contacts, bank exports and the routes you run from home stay on your phone or computer from start to finish.

How it stays private
  1. 1You open a file. It loads into your browser only.
  2. 2The conversion happens on your device.
  3. 3You save the result. Nothing was sent anywhere.

Guides for everyday jobs

All guides →

PDFs, photos or video?

Our sister sites make the same promise. Think PAGES combines, signs and converts PDFs; Think MEDIA compresses and converts photos, video and sound. Nothing is uploaded.

Know someone who'd find this handy?

Send the link to a friend or colleague. It's free for them too, with no sign-up.

How it works

  1. Open any file. It loads in your browser; nothing is sent anywhere.
  2. Choose what to turn it into. Only the formats that make sense for your file are shown.
  3. Press Convert and save the result, or a ZIP of them all.

Questions

Are my files uploaded?

No. Everything happens inside your browser, on your own device. The site's security settings stop the page from sending your files anywhere.

Which files can I convert?

Spreadsheets (CSV, Excel, Numbers, ODS), data (JSON, XML, YAML, TOML, Parquet, SQLite), documents (Word, DOC, ODT, Pages, RTF, Markdown, HTML, text), slideshows (PPT, PPTX, ODP), ebooks (EPUB, MOBI, AZW3, FB2, CBZ), email (MSG, EML, MBOX), fonts (TTF, OTF, WOFF, WOFF2), subtitles (SRT, VTT, ASS, SBV), contacts (VCF), calendars (ICS), GPS files (GPX, KML, KMZ, FIT, TCX, GeoJSON), archives (RAR, 7Z, ZIP, TAR), 3D models (STEP, IGES, STL, OBJ, GLB, FBX, 3MF, PLY, USDZ) and CAD drawings (DWG, DXF, SVG).

Can it make 3D prints from pictures?

Yes. Turn a logo into a raised sign, a photo into a lithophane, a picture into a relief, or typed text into a nameplate, all ready for your slicer.

What about PDFs, photos and videos?

Our sister sites do those, with the same promise: Think PAGES for PDFs and Think MEDIA for photos, video and sound.

Is it free?

Yes. No sign-up, no daily limit and no watermark.

Does it work on iPhone and Android?

Yes, in Safari, Chrome and other modern browsers. You can open files from the Files app or your downloads, and save the results back.