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Test scope & comparison notes
These are recorded facts, not a unified ranking. Tested tiers and scope are not consistently recorded. Read pricing with its date and timing with its conditions. Privacy observations reflect visible flows and statements, not a security audit.
Cross-task capability coverage across selected products
Each product is scored independently per task edge; switch tasks below while keeping shared products selected| Task edge | pdfcompressor.com | 11zon | Switch / compare |
|---|---|---|---|
| Image compression | Not tested in topic | 81/100 2048 × 2048 · PNG | Compare in task topic → |
| PDF to Word | Not tested in topic | 72/100 Legacy OLE2 .doc (25.5 KB, 0 native tables) · Historical description; output not attached | Compare in task topic → |
| PDF compression | 79/100 PDF · Output attached | 75/100 PDF · Output attached | Active task |
| PDF merge & split | Not tested in topic | 95/100 PDF · Output attached | Compare in task topic → |
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Browse this task →| Criterion | PDF Compressor PDF compression 79/100 Seven-aspect task score PDF Compressor provides a completely free, login-free batch compression service supporting up to 20 files with 1-hour auto-purge, slashing file size by 90.82% in 2.08s, but at the steep cost of rasterizing most vector text into bitmaps, sacrificing text selectability and sharp rendering. Tested export PDF · Output attached Historical test · 2026-10-31 | 11zon PDF Compressor PDF compression 75/100 Seven-aspect task score Free, login-free on-device compression shrinks the 1.66 MB PDF by 94.44% to 92.2 KB, but flattens every page into an 816×1056 JPEG bitmap (0% selectable vector text retained) and displays deceptive extension ad banners. Tested export PDF · Output attached Historical test · 2026-10-23 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | PDF Compressor web batch compression tool · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Web Free2026-10-31 ↗ Free Free Free Batch upload up to 20 files per task, unlimited daily usage Automated PDF compression with individual or batch ZIP downloads；1-hour file retention, maximum 20 files per batch 1 plan / billing-period records, all listed; — means that period is not recorded. Official site explicitly states all features are free, supporting up to 20 files at once with zero paywalls. Cancellation, sources & verification recordCompletely free without subscription; no cancellation or refund terms needed. Official homepage and compression workspace ↗ · 2026-10-31 Capture 1 ↗ | 11zon web PDF-to-Word free tool · 2026-10-20 Plan · source date Monthly / one-time Annual bill / period Quota & limits Web free2026-10-20 ↗ Free Free Free Free conversion; the page says multiple PDFs can be converted together. Numeric page and file-size limits are not listed. 1 plan / billing-period records, all listed; — means that period is not recorded. The official tool page states free, unlimited conversion. Numeric size and page limits are not published; the claim is not a guarantee for arbitrary files. Cancellation, sources & verification recordCancellation and refund terms follow official checkout and help policies. Official feature and pricing page ↗ · 2026-10-20 Capture 1 ↗ |
| Free & trial allowance on the test date | Completely free, batch upload up to 20 files per task | Free and unlimited with multi-file batch upload and ZIP download |
| Cancellation & refunds | Completely free without subscription; no cancellation or refund terms needed. | Cancellation and refund terms follow official checkout and help policies. |
| Disclosure of costs & limits | Homepage states 20-file batch limit; terms specify 1-hour deletion | Does not warn users that vector text pages will be flattened into JPEG images |
| Task quality | ||
| Measured fixture results | File reduction: 90.82% · Output size: 152.3 KB · Selectable text retained: 11.1% · Page 2 preserved: Yes | File reduction: 94.44% · Output size: 92.2 KB · Selectable text retained: 0% · Page 2 preserved: Yes |
| Fixture findings | In the 2-page mixed-content anchor benchmark, file size plummeted from 1,659 KB to 152.3 KB (-90.82%), but underlying vector text retention dropped to 11.1% (only 1 of 4 headings preserved, table text fully rasterized). | Reduced file size by 94.44% (92.2 KB output) across 2 pages, but flattened all pages into JPEG bitmaps with 0% selectable vector text retained. |
| Original historical observation | PDF Compressor accepted the sample without login, compressed it by 90.82% to 152.3 KB in 2.08s, and exported a watermark-free PDF with rasterized text (01_landing.png, 02_result.png, 03_download.png). | By file size alone (1.62 MB -> 92.18 KB), 11zon looks competitive with Sejda and iLovePDF; however, PDF stream inspection reveals that 11zon flattens every page into an 816×1056 JPEG image (/I0 Do, /I1 Do), turning sharp vector typography and tables into blurry, unsearchable bitmaps (02_result.png, 03_download.png). |
| Suitable uses · historical assessment | Users needing maximum file size reduction who do not require searchable or selectable vector text | Already-scanned image-only PDFs where selectable text, copy-paste, and crisp zoom are not needed and local browser processing is preferred |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | PDF · Output attached · No watermark in test | PDF · Output attached · No watermark in test |
| Historical specification note · not an official maximum | Two-page PDF (152.3 KB, no watermark, 90.82% reduction) | 2-page full-page rasterized PDF (92.2 KB · 816×1056 JPEG wrapper · 0% selectable text) |
| Watermark observation | No watermark | Watermark-free |
| Batch & API | Supports batch upload of up to 20 files with ZIP download | Supports multi-PDF batch compression and Download ZIP |
| Recorded free-tier dimensions | Not verified | Not verified |
| Attached file dimensions | Not verified | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 2.08s · End-to-end reference: 2.08s | Recorded local processing time: 1.85s · End-to-end reference: 1.85s |
| Date & fixture | 2026-10-31 · anchor_pdfcompress_v1 · US-West (California, AS2914) | 2026-10-23 · anchor_pdfcompress_v1 · US-West (California, AS2914) |
| Repeated tests & reliability | No standardized repetition count, success rate or variability range is recorded. | No standardized repetition count, success rate or variability range is recorded. |
| Interaction experience | ||
| Account requirements | No login in this test | No login in this test |
| Sign-in methods | Direct batch upload with zero login required | Completely login-free |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | No login required, but the result screen places a large deceptive ad banner ("DOWNLOAD EXTENSION — 1. Click 'Download' 2. Add Trusted Spot Extension") directly below the workspace that can easily mislead users (02_result.png). |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | PDF Compressor Team | 11zon Team |
| Recorded origin | Not verified | India / Global CDN |
| Domain history record | Not verified | 2021–Present |
| Background & reputation assessment | Not verified | Operated by 11zon (bigpdf.11zon.com), a high-traffic free online document and image utility suite. |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | Uploaded for cloud processing | On-device processing |
| Third-party tracking record | Google Ads · Google Analytics | No third-party services listed in this record; this is not proof that none exist. |
| Engineering & privacy assessment | Not verified | Executes locally inside the browser via Canvas + jsPDF without uploading the document to a remote server queue. |
| Retention statement | Claims deletion within 1 hours; deletion not independently verified | This flow runs locally; post-close deletion not independently verified |
| Evaluation basis | ||
| Pricing transparency | 30 / 35 100% free and login-free, automatically compressing the uploaded PDF at the default 60% level in ~1.85s (92.18 KB); however, it does not disclose that it rasterizes entire PDF pages into non-selectable JPEG bitmaps (01_landing.png, 02_result.png, 03_download.png). | |
| Interaction restraint | 21 / 30 No login required, but the result screen places a large deceptive ad banner ("DOWNLOAD EXTENSION — 1. Click 'Download' 2. Add Trusted Spot Extension") directly below the workspace that can easily mislead users (02_result.png). | |
| Background & reputation | 17 / 20 Operated by 11zon (bigpdf.11zon.com), a high-traffic free online document and image utility suite. | |
| Engineering & privacy | 14 / 15 Executes locally inside the browser via Canvas + jsPDF without uploading the document to a remote server queue. | |
| Task quality | 45 / 65 Size Reduction: -90.82% (1659 KB → 152.3 KB, 10.89× ratio) · Selectable Vector Text Retained: 11.1% · Page 2 Preserved: Yes | 45 / 65 Deterministic PDF stream inspection uncovers a critical flaw: although file size drops from 1,659.0 KB to 92.2 KB (-94.44%, 18.0× ratio) with both pages present, 11zon rasterizes every page into an 816×1056 lossy JPEG bitmap (/Subtype /Image /Filter /DCTDecode), wiping out 100% of vector text operators (bt_operator_count = 0, text_retention_pct = 0.0%) so text can no longer be selected, copied, or searched (45.0/65) |
| Deliverable specifications | 14 / 20 Clean unwatermarked export (8/8); Export spec: Two-page PDF (152.3 KB, no watermark, 90.82% reduction) | 13 / 20 Exports a 92.2 KB 2-page watermark-free PDF with adjustable compression percentage, but full-page 816×1056 JPEG rasterization blurs typography and destroys selectable text (13.0/20) |
| Processing speed | 15 / 15 Network-observed server wait: 2.08s (API mode: cloud_pdfcompressor_cluster; network upload 0s / end-to-end 2.08s shown for reference only, never penalized) | 14 / 15 In-browser Canvas rendering and jsPDF packaging finishes automatically in ~1.85s (14.0/15) |
