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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 | aconvert.com | pdfresizer.com | Switch / compare |
|---|---|---|---|
| Image compression | 86/100 2048 × 2048 · PNG | Not tested in topic | Compare in task topic → |
| PDF to Word | 79/100 DOCX · Output attached | Not tested in topic | Compare in task topic → |
| PDF compression | 96/100 PDF · Output attached | 75/100 PDF · Output attached | Active task |
| Video compression | 85/100 MP4 · Output attached | Not tested in topic | Compare in task topic → |
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Browse this task →| Criterion | Aconvert PDF compression 96/100 Seven-aspect task score Aconvert achieved a remarkable 93.96% size reduction on the 1.66MB benchmark PDF down to 100.2 KB (16.56x compression ratio) without requiring an account, preserving 100% of all 32 vector text operator groups and table layouts; with a 4.54s server turnaround and zero watermarks, it stands as an outstandingly honest and effective free PDF compressor. Tested export PDF · Output attached Historical test · 2026-11-05 | PDF Resizer PDF compression 75/100 Seven-aspect task score PDF Resizer provides completely free, login-free online PDF compression and optimization with 0.41s server processing, 100% vector text retention, and 1-hour automatic file deletion, though its default prepress preset achieves negligible size reduction on mixed-content PDFs. Tested export PDF · Output attached Historical test · 2026-10-31 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | Aconvert 100% free file conversion and compression service · 2026-11-01 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-11-01 ↗ Free Free Free 100% free without login, 40MB per file, up to 10 files per batch Full access to multi-format conversion and compression across documents, media, eBooks, and archives；40MB per-file limit, 10 files per batch, display ads present；Permanently free, no renewal；Perpetual access 1 plan / billing-period records, all listed; — means that period is not recorded. All conversion and compression features are 100% free with ad and voluntary donation support; 40MB per-file limit (up to 10 files per batch) with zero paid plans or paywalls. Cancellation, sources & verification recordCancellation and refund terms unverified Aconvert Official Homepage ↗ · 2026-11-01 Capture 1 ↗ Aconvert About and Free Model ↗ · 2026-11-01 Capture 1 ↗ | PDFResizer entire web utility suite · 2026-10-31 Plan · source date Monthly / one-time Annual bill / period Quota & limits Web Free2026-10-31 ↗ Free Free Free Unlimited usage without login; supports standard merging, splitting, compressing, and resizing Includes PDF resizing, merging, splitting, cropping, rotation, optimization, and N-up layout；Queue-based server processing; files automatically purged after 1 hour 1 plan / billing-period records, all listed; — means that period is not recorded. Official site explicitly declares all tools are free to use without limits or paid subscriptions, supported by advertising. Cancellation, sources & verification recordCompletely free without subscription; no cancellation or refunds needed. Official homepage and tools overview ↗ · 2026-10-31 Capture 1 ↗ |
| Free & trial allowance on the test date | Entirely free with 40MB per-file limit and up to 10 files per batch | Completely free with no limits; standard file size support |
| Cancellation & refunds | Not verified | Completely free without subscription; no cancellation or refunds needed. |
| Disclosure of costs & limits | Direct result table with download and delete actions after conversion | Homepage and tool pages clearly state 100% free usage and 1-hour auto deletion |
| Task quality | ||
| Measured fixture results | File reduction: 93.96% · Output size: 100.2 KB · Selectable text retained: 100% · Page 2 preserved: Yes | File reduction: -0.18% · Output size: 1662 KB · Selectable text retained: 100% · Page 2 preserved: Yes |
| Fixture findings | 93.96% reduction (1,659 KB → 100.2 KB, 16.56x ratio), 100% vector text retention, 4.54s server processing, free guest export without watermarks. | In the 2-page mixed-content anchor benchmark, the default preset preserved 100% of selectable vector text operators (4/4 headings, 12/12 table cells), but file size was not reduced (1,659 KB to 1,662 KB, -0.18%). |
| Original historical observation | Aconvert compressed the 1.66MB test PDF down to 100.2 KB under default 60 image quality while preserving 100% vector text and layout integrity (02_result.png, 03_download.png). | PDF Resizer accepted the sample without login, processed it in 0.41s on the server, preserved 100% vector text, and exported a 1.62 MB watermark-free PDF (01_landing.png, 02_result.png, 03_download.png). |
| Suitable uses · historical assessment | Users needing massive PDF size reduction with razor-sharp vector text and zero account or subscription barriers | Users needing fast, account-free online document processing with guaranteed 100% text selectability |
| 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 | Full 2-page native vector PDF (100.2 KB, 93.96% reduction) | Full 2-page native vector PDF (1,662 KB, no watermarks) |
| Watermark observation | No watermark | No watermark |
| Batch & API | Supports up to 10 files per batch; 40MB per-file limit | Supports multi-file batch upload/merge; no public REST API |
| Recorded free-tier dimensions | Not verified | Not verified |
| Attached file dimensions | Not verified | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 4.54s · End-to-end reference: 6.04s | Network-observed server wait: 0.41s · End-to-end reference: 0.41s |
| Date & fixture | 2026-11-05 · anchor_pdfcompress_v1 · US-West (California) | 2026-10-31 · 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 | 100% guest access without account | Direct upload and download with zero login required |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | Not verified |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Aconvert Project (PDFConvertOnline.com) | SIA Open Idea |
| Recorded origin | United States | Not verified |
| Domain history record | Development team active since 2000; Aconvert extended operations | Not verified |
| Background & reputation assessment | Not verified | Not verified |
| External reputation record | Long-running conversion service with over 530 million files converted, transparent server infrastructure disclosure, and multi-language support. | Not verified |
| Engineering & privacy | ||
| Processing location | Uploaded for cloud processing | Uploaded for cloud processing |
| Third-party tracking record | Google AdSense · Google Analytics | Google Ads · Setupad · Amazon Ads |
| Engineering & privacy assessment | Not verified | Not verified |
| Retention statement | Claims deletion within 2 hours; deletion not independently verified | Claims deletion within 1 hours; deletion not independently verified |
| Evaluation basis | ||
| Pricing transparency | ||
| Interaction restraint | ||
| Background & reputation | ||
| Engineering & privacy | ||
| Task quality | 65 / 65 Size Reduction: -93.96% (1659 KB → 100.2 KB, 16.56× ratio) · Selectable Vector Text Retained: 100% · Page 2 Preserved: Yes | 34 / 65 Size Reduction: --0.18% (1659 KB → 1662 KB, 1× ratio) · Selectable Vector Text Retained: 100% · Page 2 Preserved: Yes |
| Deliverable specifications | 20 / 20 Clean unwatermarked export (8/8); Export spec: Full 2-page native vector PDF (100.2 KB, 93.96% reduction) | 18 / 20 Clean unwatermarked export (8/8); Export spec: Full 2-page native vector PDF (1,662 KB, no watermarks) |
| Processing speed | 13 / 15 Network-observed server wait: 4.54s (API mode: cloud_aconvert_compress; network upload 1.5s / end-to-end 6.04s shown for reference only, never penalized) | 15 / 15 Network-observed server wait: 0.41s (API mode: cloud_ghostscript_linux; network upload 0s / end-to-end 0.41s shown for reference only, never penalized) |
