OpenToolDesk.
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FILE CONVERSION GUIDE

Resize images,
convert and download files.

Find your workflow

The tool directory organizes image, PDF, spreadsheet and conversion tools by task. Each page shows supported formats, limits, processing location and important output limitations. Browser tools run locally. Server tools upload only when you press Create result, then provide a private download and remove temporary files.

Choose the right image tool

The bulk image resizer fits each photo inside maximum dimensions while keeping its proportions. A 2400 × 1200 photo fitted within 1200 × 1200 becomes 1200 × 600. It does not crop your photo.

The product image formatter creates an exact canvas size for every photo. That same image on a 1200 × 1200 canvas has space above and below it. Optional padding adds more space. Existing backgrounds remain; the tool does not remove them.

Choose a format

  • JPG: useful for photos. It uses lossy compression and replaces transparency with white.
  • PNG: lossless encoding with transparency. It can make photographic files much larger.
  • WebP: supports transparency and adjustable lossy quality. Available output depends on your browser; the tool reports unsupported encoding instead of silently changing formats.

Work in batches

Add up to 50 images, with a 20 MB limit per image and a 100 MB input batch limit. Input images are limited to 24 megapixels. Output dimensions are capped at 4096 pixels per side and 16 megapixels total. Processed outputs are limited to 100 MB per batch. On a phone, smaller batches help avoid running out of memory.

Review before downloading

After processing, each row shows a thumbnail, output dimensions and file size. Download images individually or get a ZIP containing successful results. If you change settings, process again to update the results. Invalid files are reported individually.

Supported files and limitations

Use JPG, PNG or static WebP. HEIC, GIF, SVG and animated WebP are not supported. Output is re-encoded and metadata is not preserved. Compression and browser color management can affect the result, so retain your originals.

If something goes wrong

Try fewer images, smaller dimensions, or a current browser version. Cancel ends the active batch; completed results stay available. Reloading the page clears the current session. Files are never uploaded as a fallback.