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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 | imageresizer.com | ImgUpscaler | Switch / compare |
|---|---|---|---|
| Image compression | 91/100 2048 × 2048 · PNG | Not tested in topic | Compare in task topic → |
| Image upscaling | 90/100 2048 × 2048 · PNG | 85/100 2048×2048 (PNG · 400% / 4.0x AI Upscale) · Historical description; output not attached | Active task |
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Browse this task →| Criterion | ImageResizer Image upscaling 90/100 Seven-aspect task score Provides login-free client-side HTML5 Canvas upscaling to 2048×2048 (4.0×) watermark-free PNG in 3.41s with zero data upload; operates via client-side interpolation rather than generative AI super-resolution, with standard banner ads. Tested export 2048 × 2048 · PNG Historical test · 2026-11-01 | ImgUpscaler (AI Image Upscaler) Image upscaling 85/100 Seven-aspect task score Free login-free 4× output retains detail well; a fullscreen ad can interrupt initial use, and this run took about 22 seconds. Tested export 2048×2048 (PNG · 400% / 4.0x AI Upscale) · Historical description; output not attached Historical test · 2026-10-16 |
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| Pricing & rules | ||
| Pricing plans | Site-wide image resizing, compression, cropping, and conversion subscriptions · 2026-11-01 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-11-01 ↗ Free Free Free 10MB file limit, up to 5 images per batch, 10 images/day across premium tools Access to basic image resizer, compressor, converter, and cropping tools；Ad-supported, 5 images per batch, 10MB per image；Free indefinitely, no renewal；Perpetual access Pro2026-11-01 ↗ USD 6.99/month — Monthly 50MB file limit, up to 20 images per batch, 100 images/day across premium tools Full access to Image Resizer tools, zero ads, priority processing；50MB per image, 20 images per batch Rules [1] [2]Ultra2026-11-01 ↗ USD 9.99/month — Monthly 1GB file limit, up to 100 images per batch, unlimited images Highest specifications across all tools, 24/7 dedicated support, zero ads；1GB per image, 100 images per batch Rules [1] [2]3 plan / billing-period records, all listed; — means that period is not recorded. Free tier covers up to 10MB/image and 5 images/batch; Pro ($6.99/mo) and Ultra ($9.99/mo) offer higher limits with no hidden fees and cancel-anytime policy. Cancellation, sources & verification recordCancellation and refund terms unverified ImageResizer Official Pricing ↗ · 2026-11-01 Capture 1 ↗ | ImgUpscaler personal and business plans (Free / Premium / Business); USD · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-21 ↗ Free Free Free 50 credits/month; single-image AI upscaling, enhancement, and Reimagine (includes ads; guest single-image 4x upscaling available). Premium Monthly2026-10-21 ↗ USD 9.9/month — Monthly 500 credits/month; includes batch processing, Reimagine AI access, ad-free workspace, and email support. Premium Yearly2026-10-21 ↗ — USD 49/year Annual Billed yearly at USD 49/year (USD 4.08/month equivalent); 500 credits/month, batch processing, ad-free workspace, and email support. Business Monthly2026-10-21 ↗ USD 19.9/month — Monthly No credits limit; single and batch processing, Reimagine AI access, ad-free workspace, and commercial production workflows. Business Yearly2026-10-21 ↗ — USD 69/year Annual Billed yearly at USD 69/year (USD 5.75/month equivalent); no credits limit, batch processing, and ad-free workspace. 5 plan / billing-period records, all listed; — means that period is not recorded. The official pricing page lists Free (USD 0, 50 credits/month, single-image processing, includes ads), Premium (USD 9.90/month or USD 49/year, equivalent to USD 4.08/month, with 500 credits/month, batch processing, and no ads), and Business (USD 19.90/month or USD 69/year, equivalent to USD 5.75/month, with no credit limit, batch processing, and no ads). Cancellation, sources & verification recordCancel or change plans anytime from the account billing page; both free and paid results may be used for personal or commercial projects subject to source-image rights. ImgUpscaler official monthly/yearly pricing and FAQ ↗ · 2026-10-21 Capture 1 ↗ · Capture 2 ↗ |
| Free & trial allowance on the test date | 10MB per file limit, purely client-side Canvas rendering, no daily hard generation limit | Free single-image 200% (2x) and 400% (4x) unwatermarked upscaling without login; batch upload requires a paid plan |
| Cancellation & refunds | Not verified | Cancel or change plans anytime from the account billing page; both free and paid results may be used for personal or commercial projects subject to source-image rights. |
| Disclosure of costs & limits | Not verified | No paywall traps; supported by standard and vignette Google AdSense ads |
| Task quality | ||
| Measured fixture results | Tested scale: 4× | Tested scale: 4× |
| Fixture findings | The 4× upscale remains smooth and clean, achieving 26.89 dB PSNR and 0.8867 SSIM with legible main sign text, though fine high frequencies are smoother than generative diffusion models. | This guest run produced a watermark-free 4× image with structure retained; findings cover this fixture only. |
| Original historical observation | Uploaded 512×512 anchor image; selected By Dimensions mode setting target to 2048×2048 (4.0x upscale). Client HTML5 Canvas rendered deliverable in 3.41 seconds, achieving 26.89 dB PSNR, 0.8867 SSIM, and 15.07 dB plate PSNR. Deliverable remained clean and smooth; direct Base64 PNG download. | PSNR=27.50dB · SSIM=0.8900 (4x 2048×2048 unwatermarked PNG); edge_corr=0.6685, hf_ratio=0.4995, plate_psnr=16.22dB—one of the very few tools offering genuine 400% watermark-free exports to anonymous guests. |
| Suitable uses · historical assessment | Not verified | Users who want true 4x (2048×2048) watermark-free faithful super-resolution without creating an account |
| Result & output evidence | No native output obtained; the preview does not establish final export quality. | |
| Delivery capabilities | ||
| Recorded export specifications | 2048 × 2048 · PNG · Check watermark record | 2048×2048 (PNG · 400% / 4.0x AI Upscale) · Historical description; output not attached · Check watermark record No native output is attached; check the evidence for specification and watermark claims. |
| Historical specification note · not an official maximum | 2048×2048 (PNG · 4.0x native export) | 2048×2048 (4.0x / 400% · Free without login) |
| Watermark observation | Not verified | 100% Watermark-Free |
| Batch & API | Not verified | Batch web upload on paid plans; offline batch processing via desktop app Upscal.app |
| Recorded free-tier dimensions | 2048 × 2048 | Not verified |
| Attached file dimensions | 2048 × 2048 · PNG | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 3.41s · End-to-end reference: 3.41s | Network-observed server wait: 20.68s · End-to-end reference: 22.22s |
| Date & fixture | 2026-11-01 · anchor_upscale_v1 · US-West (California, AS2914) | 2026-10-16 · anchor_upscale_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 | Not verified | No login in this test |
| Sign-in methods | Available without login; supports email registration and paid subscriptions | No login required; optional email/Google login for paid plans |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | Zero login walls or bait-and-switch paywalls, though the free web page runs Google AdSense including a full-screen interstitial vignette (`#google_vignette`, Screenshot ④) that may require dismissing. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | ImageResizer.com | ImgUpscaler / Upscal.app Team |
| Recorded origin | United States | Independent Cross-Platform Utility Team (Web + macOS/Windows App Store) |
| Domain history record | Founded in 2012 | 2020–Present |
| Background & reputation assessment | Not verified | Operated by the independent team behind Upscal.app (available on the Mac App Store and Microsoft Store). |
| External reputation record | Established free online image tool suite with over 14 years of reliable operation. | Not verified |
| Engineering & privacy | ||
| Processing location | Processing location unconfirmed | Uploaded for cloud processing |
| Third-party tracking record | Google Analytics · Google AdSense | Not verified |
| Engineering & privacy assessment | Not verified | Uses `/api/legacy/upload` and `/api/legacy/status` async polling; FAQ #10 explicitly states all uploaded and processed images are permanently deleted within 24 hours. |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Claims deletion within 24 hours; deletion not independently verified |
| Evaluation basis | ||
| Pricing transparency | 32 / 35 Anonymous guests can select `400%` (4x) or `200%` (2x) directly on the home page, click 'Upload & Start', and download a 100% watermark-free 2048×2048 (4x) PNG without signing up or entering a card (Screenshots ②③). | |
| Interaction restraint | 21 / 30 Zero login walls or bait-and-switch paywalls, though the free web page runs Google AdSense including a full-screen interstitial vignette (`#google_vignette`, Screenshot ④) that may require dismissing. | |
| Background & reputation | 15 / 20 Operated by the independent team behind Upscal.app (available on the Mac App Store and Microsoft Store). | |
| Engineering & privacy | 12 / 15 Uses `/api/legacy/upload` and `/api/legacy/status` async polling; FAQ #10 explicitly states all uploaded and processed images are permanently deleted within 24 hours. | |
| Task quality | 55.5 / 65 PSNR vs 2048px GT: 26.89 dB · SSIM: 0.8867 · Edge Gradient Correlation: 0.5494 · High-Freq Sharpness Ratio: 0.3258 · Calibration Plate PSNR: 15.07 dB | 58.5 / 65 PSNR vs 2048px GT: 27.5 dB · SSIM: 0.89 · Edge Gradient Correlation: 0.6685 · High-Freq Sharpness Ratio: 0.4995 · Calibration Plate PSNR: 16.22 dB |
| Deliverable specifications | 20 / 20 Clean unwatermarked export (8/8); Free scale factor: 4x (2048×2048 (PNG · 4.0x native export)) | 20 / 20 No free unwatermarked export (0/8); Free scale factor: 4x (2048×2048 (4.0x / 400% · Free without login)) |
| Processing speed | 14.5 / 15 Network-observed server wait: 3.41s (API mode: client_side; end-to-end 3.41s shown for reference only, never penalized) | 8 / 15 Network-observed server wait: 20.68s (API mode: async_poll; end-to-end 22.22s shown for reference only, never penalized) |
