Compress PDF: iHateUpload vs ihatepdf.cv

Both ihatepdf.cv and iHateUpload run Compress PDF in your browser without uploading the file. Here is what each one does and what happened when we ran the same synthetic test files through both.

Side by side

• Compress PDF

  iHateUpload ahead

  iHateUpload

  Images resampled to the size they are drawn (MozJPEG), quality guided by PSNR, text kept; target size 100 KB–5 MB

  ihatepdf.cv

  Several codecs per image, font subsetting, JBIG2 for 1-bit scans; levels and target size

  How we checked

  10.5 MB photo PDF at medium: ours 94.3 KB, theirs 95 KB, both keep text. A 12.6 MB synthetic 5-page scan: Light 391 KB vs 793 KB, Medium 101 KB vs 295 KB, smallest 48 KB with 98.1% OCR accuracy vs 75 KB with 34.5%; 2.4–2.9 s vs 19–30 s. Checked 2026-10-17.

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