How to check PDF merge order and catch missing pages
Separate file names from the real document order, then compare page counts and the points where one document ends and the next begins.
Input examples and how-toEntering PDF page ranges: order, duplicates and errors
Explains how input such as 1-3, 5 works, the difference between ZIP and a single PDF, and how reversed ranges, duplicates and printed page numbers are handled.
Input examples and how-toFour things to check when a PDF is too large, and this tool’s limits
Before you try to meet an upload size limit, review the pages, the images, the conversion method and your originals, and understand how this differs from dedicated PDF compression.
Input examples and how-toImage file size vs. pixel dimensions: compressing, resizing and choosing a format
Separates quality from resolution, and explains PNG transparency, how maximum dimensions are calculated and why compression sometimes does not shrink a file.
Input examples and how-toPDF to JPG: checking resolution, page ranges and lost text
Explains the pixel math behind the 72, 144 and 216 dpi options, JPG and ZIP results, and the features lost when pages become images.
Input examples and how-toMedia and unit tools
The general audio→WAV and video→WebM workspaces and the dedicated MOV→MP4, MP4→MP3 and video→GIF tools have different outputs and limits. Not every file is compatible down to the codec. The unit converter calculates from the values you enter, without any file.
Check the scope of each supported tool