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What File Tools reads and writes, how big a file can be, and what to do when a job does not work.
Files you choose are processed on this device. They are not uploaded to UnionOps or to another service.
File Tools reads the files you choose in this browser and makes new files here. They are not sent to UnionOps or to a conversion service, and File Tools keeps no history of them. Results stay in this page's memory until you clear them or leave the page.
Some tools need extra converter or model files the first time. Those files come from this site and contain no information about you or your files. You can delete them below.
File Tools runs open source converters and models. Their licences and notices are in one text file. Licences for the software File Tools runs
| Tool | Reads | Makes |
|---|---|---|
| Convert images | JPEG, PNG, WEBP, AVIF, GIF, BMP, HEIC, TIFF | JPG, PNG, WEBP, AVIF |
| Resize, crop, and rotate | JPEG, PNG, WEBP, AVIF, GIF, BMP, HEIC, TIFF | JPG, PNG, WEBP, AVIF |
| Open HEIC and TIFF | HEIC, TIFF | JPG, PNG, WEBP |
| GIF frames and short GIFs | JPEG, PNG, WEBP, AVIF, GIF, BMP, HEIC, TIFF | GIF, PNG, ZIP |
| Watermark, contact sheet, and favicon | JPEG, PNG, WEBP, AVIF, GIF, BMP, HEIC, TIFF | PNG, JPG, WEBP, ICO, ZIP |
| Photo details and location | JPEG, PNG, WEBP, AVIF, HEIC, TIFF | JPG, PNG, WEBP |
| Merge, split, and reorder | PDF, ZIP | |
| Images, pages, and text | PDF, JPEG, PNG | PDF, PNG, JPG, TXT, ZIP |
| Forms, page numbers, and watermark | ||
| Make a PDF smaller | ||
| Read text from scans | JPEG, PNG, WEBP, BMP, TIFF, PDF | TXT, MD |
| Convert audio | MP3, WAV, FLAC, OGG, M4A, AAC, WEBM, MP4 | MP3, WAV, FLAC, M4A, OGG, WEBM |
| Trim, join, and set levels | MP3, WAV, FLAC, OGG, M4A, AAC, WEBM, MP4 | MP3, WAV, FLAC, M4A, OGG |
| Sound from a video | MP4, MOV, WEBM, MKV | M4A, OGG, MP3, WAV, WEBM |
| Convert video | MP4, MOV, WEBM, MKV | MP4, WEBM |
| Resize, trim, and compress | MP4, MOV, WEBM, MKV | MP4, WEBM |
| Stills and short GIFs | MP4, MOV, WEBM, MKV | JPG, PNG, GIF, ZIP |
| Join clips and add captions | MP4, MOV, WEBM, MKV, SRT, VTT | MP4, WEBM |
| Edit and convert subtitles | SRT, VTT, TXT | SRT, VTT, TXT |
| Create and open ZIP files | Any file | ZIP |
| Convert CSV, JSON, and XML | CSV, TSV, JSON, XML, TXT | CSV, TSV, JSON, XML |
| Text encodings and line endings | TXT, MD, CSV, TSV, SRT, VTT, JSON, XML | TXT, MD, CSV, TSV, SRT, VTT, JSON, XML |
| Spreadsheet values | XLSX, CSV, TSV, JSON | CSV, JSON, XLSX |
| Extract from Word | DOCX | TXT, MD, HTML |
| Rebuild as Word, PDF, or slides | DOCX, MD, TXT | DOCX, PDF, PPTX |
| Transcribe speech | MP3, WAV, FLAC, OGG, M4A, AAC, WEBM, MP4, MOV, MKV | TXT, SRT, VTT |
| Remove a photo background | JPEG, PNG, WEBP | PNG, WEBP |
| Reduce noise in speech | MP3, WAV, FLAC, OGG, M4A, AAC, WEBM, MP4 | WAV, FLAC |
These limits keep a browser tab from running out of memory. On phones and smaller devices some limits are lower.
These are refused with a message rather than guessed at:
Large results can use temporary storage on this device if you turn it on. A crash can leave temporary files behind; File Tools removes files older than a day the next time you open it, and you can remove them now. Deleting a file this way is not a secure erase.
This browser does not offer temporary storage, so large results stay in memory.
Long videos, very large files, and exact Word or PowerPoint layouts are beyond what a browser can do reliably. Desktop programs such as LibreOffice, HandBrake, and Audacity are free and work offline on your own computer.
Text read from scans, draft captions, and removed backgrounds are made by software and can be wrong. Read them before you share them. Removing photo metadata is not the same as removing what a photo shows.