Adobe's "Compress PDF to 200KB" page turned our 2.04 MB scan into 203.74 KB, just over the limit its title promises, and processed the file on Adobe's servers. CompressKaro produced 180.5 KB from the same file without uploading it. Adobe Acrobat remains the most complete PDF editor.
Side by side
| CompressKaro | Adobe Acrobat online | |
|---|---|---|
| Where the file is processed | In your browser; the file is never uploaded | On Adobe servers; deleted unless you sign in to save it (Adobe's page) |
| How you choose the size | Exact KB/MB target (12 presets + custom) | Compression levels; India pages titled "Compress PDF to 100KB / 200KB / 250KB" |
| 200 KB test (a 2.04 MB scanned-style PDF (synthetic, no personal data)) | 180.5 KB (under the limit) | 203.74 KB on the "Compress PDF to 200KB" page (over the limit) |
| Account | None | "Free to use, no sign-up to try"; sign-in to save files |
| Page weight on a phone | 242 KB of JavaScript, 0 ad/tracker hosts | 467 KB of JavaScript, 0 ad/tracker hosts |
Where Adobe Acrobat online is better
- The most capable PDF editor and the standard reader. UIDAI recommends Adobe Acrobat Reader for validating the digital signature on an e-Aadhaar.
- Offers to recompress for higher quality and shows an estimate.
- No ads or trackers on the page in our test.
Where CompressKaro is better
- Hit the 200 KB limit (180.5 KB); Adobe's 200 KB page came out at 203.74 KB.
- Type any limit, not just the sizes Adobe has a page for.
- No upload and no sign-in prompt.
Which should you use?
Use Adobe Acrobat to edit, sign or validate PDFs. Use CompressKaro when a portal needs the file under an exact size.
How we tested
On 17 October 2026 we ran each tool in Chrome with the same synthetic 2.04 MB scanned PDF, measured the file each one produced for a 200 KB limit, and logged every network request that could carry the file. Numbers can differ with other files. Full method and its limits: how we test. Results for all tools: compare PDF compressors.
Sources
- CompressKaro test: output size and network log (method on /compare/how-we-test), checked 17 October 2026
- Adobe: Compress PDF to 200KB (India), checked 17 October 2026
- UIDAI: e-Aadhaar FAQs, checked 17 October 2026