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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 | picresize.com | aconvert.com | Switch / compare |
|---|---|---|---|
| Image compression | 95/100 JPEG · Output attached | 86/100 2048 × 2048 · PNG | Active task |
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Browse this task →| Criterion | PicResize Image Compressor Image compression 95/100 Seven-aspect task score Pioneering web photo tool running for over 21 years, exporting 2048×2048 watermark-free compressed JPGs without login; slashes size by 84.4% while sustaining a remarkable 46.3 dB PSNR. Tested export JPEG · Output attached Historical test · 2026-11-03 | Aconvert Image compression 86/100 Seven-aspect task score 100% free with no login, reducing the 4.14 MB anchor by 56.5% to 1.80 MB at PSNR 36.1 dB with full-resolution unwatermarked output. Tested export 2048 × 2048 · PNG Historical test · 2026-11-01 |
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| Pricing & rules | ||
| Pricing plans | PicResize Regular free tier and Pro annual/lifetime plans · 2026-11-01 Plan · source date Monthly / one-time Annual bill / period Quota & limits Regular Free2026-11-01 ↗ Free Free Free Unlimited batch resizing, compression, and basic editing Batch resizing, file compression, cropping, and effects；Ad-supported, no AI enlarger；Free forever, no renewal；Perpetual access Pro Annual2026-11-01 ↗ — USD 60/year Annual Unlimited full access with zero ads AI lossless upscaling, batch crop, text/watermark, HEIC support, ad-free；Billed annually；Annual automatic renewal；1 year validity Pro Lifetime2026-11-01 ↗ USD 75 · one-time payment Usage / one-time Usage / one-time Lifetime unlimited full access with zero ads AI lossless upscaling, batch crop, text/watermark, HEIC support, lifetime ad-free；Single-account lifetime license；One-time payment, no renewal；Lifetime perpetual validity 3 plan / billing-period records, all listed; — means that period is not recorded. Regular version is free forever with ads; Pro version offers $60/year or $75 one-time lifetime payment for AI enlarging and ad-free experience. Cancellation, sources & verification recordCancellation and refund terms unverified PicResize Pro Official Pricing ↗ · 2026-11-01 Capture 1 ↗ | 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 ↗ |
| Free & trial allowance on the test date | Completely free and unlimited usage with 20-minute temporary direct download link | Completely free, 40MB per file limit, up to 10 files per batch |
| Cancellation & refunds | Not verified | Not verified |
| Disclosure of costs & limits | Results page clearly displays before-and-after resolution and file size | Compression parameters and instructions clearly disclosed on page |
| Task quality | ||
| Measured fixture results | File reduction: 84.38% · Output size: 646.3 KB | File reduction: 56.5% · Output size: 1800.1 KB |
| Fixture findings | Compresses 4.14 MB originals down to 646 KB at full 2048px resolution with near-flawless 0.9997 SSIM, delivering crisp edges and zero block artifacts. | Over 50% size reduction while preserving 2048px resolution and transparency; solid quality and easy to use. |
| Original historical observation | PicResize exports 2048×2048 compressed JPG without login, reducing size by 84.38% (4.14 MB → 646 KB) while sustaining 46.25 dB PSNR and 0.9997 SSIM. | Aconvert processes compression on cloud servers, reducing the 4.14 MB anchor by 56.5% to 1.80 MB under default Lossy 80 while maintaining SSIM 0.9966 and preserving micro-textures. |
| Suitable uses · historical assessment | Users and webmasters needing quick, signup-free image compression with extreme quality retention (PSNR > 46 dB) | Users and webmasters needing fast free image compression while preserving transparency and 2048px original resolution |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | JPEG · Output attached · No watermark in test | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048 × 2048 (646.3 KB original JPG) | 2048 x 2048 (Full-resolution unwatermarked PNG) |
| Watermark observation | Completely watermark-free | No watermark |
| Batch & API | Crop, rotate, filters, batch resizing, and multi-format conversion | Supports up to 10 files concurrent upload with multi-format conversion |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | Not verified | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 2.5s · End-to-end reference: 3.5s | Network-observed server wait: 11.2s · End-to-end reference: 14.7s |
| Date & fixture | 2026-11-03 · anchor_compress_v1 · US-West (California, AS2914) | 2026-11-01 · anchor_compress_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 | Completely usable without login | All platform features accessible directly without registration or login |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | Not verified |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Internich LLC | Aconvert Project (PDFConvertOnline.com) |
| Recorded origin | United States | United States |
| Domain history record | Established in 2005 | Development team active since 2000 |
| Background & reputation assessment | Not verified | Not verified |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | Uploaded for cloud processing | Uploaded for cloud processing |
| Third-party tracking record | Google Analytics · Google AdSense | Google AdSense · Google Analytics |
| Engineering & privacy assessment | Not verified | Not verified |
| Retention statement | Claims deletion within 20 minutes; deletion not independently verified | Claims deletion within 2 hours; deletion not independently verified |
| Evaluation basis | ||
| Pricing transparency | ||
| Interaction restraint | ||
| Background & reputation | ||
| Engineering & privacy | ||
| Task quality | 63 / 65 Size Reduction: -84.38% (4137.9 KB → 646.3 KB, 6.4× ratio) · PSNR: 46.25 dB · SSIM: 0.9997 | 56 / 65 Size Reduction: -56.5% (4137.9 KB → 1800.1 KB, 2.3× ratio) · PSNR: 36.1 dB · SSIM: 0.9966 |
| Deliverable specifications | 20 / 20 Clean unwatermarked export (8/8); Export spec: 2048 × 2048 (646.3 KB original JPG) | 20 / 20 Clean unwatermarked export (8/8); Export spec: 2048 x 2048 (Full-resolution unwatermarked PNG) |
| Processing speed | 13.5 / 15 Network-observed server wait: 2.5s (API mode: cloud_server_pipeline; network upload 1s / end-to-end 3.5s shown for reference only, never penalized) | 8.5 / 15 Network-observed server wait: 11.2s (API mode: cloud_server; network upload 3.5s / end-to-end 14.7s shown for reference only, never penalized) |
