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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 | Unlimited:Waifu2x | Picsart | Switch / compare |
|---|---|---|---|
| Background removal | Not tested in topic | 88/100 2048 × 2048 · PNG | Compare in task topic → |
| Image upscaling | 89/100 2048 × 2048 · PNG | 87/100 1024×1024 (PNG · 2.0x Free Tier) · Historical description; output not attached | Active task |
| Photo restoration | Not tested in topic | 69/100 JPEG · Output attached | Compare in task topic → |
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Browse this task →| Criterion | Unlimited:Waifu2x (WebGPU In-Browser SR) Image upscaling 89/100 Seven-aspect task score Free open-source, login-free on-device processing gives good 4× detail; a dismissible rewarded-ad prompt may appear on first use. Tested export 2048 × 2048 · PNG Historical test · 2026-10-17 | Picsart (AI Image Enhancer) Image upscaling 87/100 Seven-aspect task score Free and paid sizes are disclosed upfront with login-free 2× output; higher resolution needs an upgrade, and result links are accessible without login. Tested export 1024×1024 (PNG · 2.0x Free Tier) · Historical description; output not attached Historical test · 2026-10-16 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | unlimited:waifu2x in-browser AI image upscaler · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits unlimited:waifu2x Free Web2026-10-21 ↗ Free Free Free Free without login and no image-count limits (runs on local WebGPU/WASM hardware); supports up to 4x unwatermarked PNG export. 1 plan / billing-period records, all listed; — means that period is not recorded. In-browser WebGPU/WebAssembly upscaler powered by nunif/waifu2x. Completely free with no account system or paid tiers; offers swin_unet and cunet models, 1x/2x/4x upscaling, and denoise levels running on local device hardware. Cancellation, sources & verification recordCompletely free open-source-powered tool with no accounts or subscription charges. unlimited:waifu2x official page ↗ · 2026-10-21 Capture 1 ↗ | Web Pro and all public Ultra credit volumes; per Ultra seat · 2026-10-20 Plan · source date Monthly / one-time Annual bill / period Quota & limits Pro2026-10-20 ↗ USD 15/month USD 126/year Monthly 250 general credits/month; batch editing up to 50 images Annual 250 general credits/month; Ultra billed per seat Rules [1] Ultra 1,0002026-10-20 ↗ USD 45/month USD 480/year Annual 1,000 general credits/month; Ultra billed per seat Rules [1] Monthly 1,000 general credits/month/seat; batch editing up to 100 images Ultra 1,5002026-10-20 ↗ USD 75/month USD 720/year Annual 1,500 general credits/month; Ultra billed per seat Rules [1] Monthly 1,500 general credits/month/seat; batch editing up to 100 images Ultra 3,0002026-10-20 ↗ USD 129/month USD 1,440/year Annual 3,000 general credits/month; Ultra billed per seat Rules [1] Monthly 3,000 general credits/month/seat; batch editing up to 100 images Ultra 6,0002026-10-20 ↗ USD 255/month USD 2,880/year Annual 6,000 general credits/month; Ultra billed per seat Rules [1] Monthly 6,000 general credits/month/seat; batch editing up to 100 images Ultra 9,0002026-10-20 ↗ USD 379/month USD 4,320/year Annual 9,000 general credits/month; Ultra billed per seat Rules [1] Monthly 9,000 general credits/month/seat; batch editing up to 100 images 13 plan / billing-period records, all listed; — means that period is not recorded. Six annual charges verified in single-seat checkout. The current public pricing page lists Pro/Ultra without a free removal count. It says add-on credits never expire but does not quote their purchase prices, which remain unconfirmed. Annual prices are per seat; tax depends on billing address. Verification has gaps; unknown prices and quotas are not inferred. Cancellation, sources & verification recordCancel anytime in account subscription settings Official plans and usage terms ↗ · 2026-10-20 Capture 1 ↗ · Capture 2 ↗ · Capture 3 ↗ · Capture 4 ↗ · Capture 5 ↗ · Capture 6 ↗ · Capture 7 ↗ · Capture 8 ↗ · Capture 9 ↗ · Capture 10 ↗ · Capture 11 ↗ · Capture 12 ↗ · Capture 13 ↗ Annual payment summaries for each volume ↗ · 2026-10-20 Capture 1 ↗ · Capture 2 ↗ · Capture 3 ↗ · Capture 4 ↗ · Capture 5 ↗ · Capture 6 ↗ Official plans and add-on credit rules ↗ · 2026-10-20 Capture 1 ↗ |
| Free & trial allowance on the test date | Unlimited local WebGPU runs with zero daily caps or credit deductions | Free no-login 2x (1024×1024) enhancement and download; HD 4x (2048×2048) is locked behind Pro/Ultra |
| Cancellation & refunds | Completely free open-source-powered tool with no accounts or subscription charges. | Cancel anytime in account subscription settings |
| Disclosure of costs & limits | Explicitly discloses WebGPU browser requirements and model options at the top of the page | Hero subtitle explicitly states upfront: 'Plus, you can save a lower-resolution image for free!', and the download menu (03_download.png) clearly labels 1024×1024 [Free] vs 2048×2048 [Pro/Ultra] |
| Task quality | ||
| Measured fixture results | Tested scale: 4× | Tested scale: 2× |
| Fixture findings | Ran 4× upscaling locally with noise reduction and text retention; speed depends on the device. | The tested 2× output was watermark-free with sharper edges; higher scales were not verified here. |
| Original historical observation | Waifu2x Unlimited (Swin-UNet Photo 4x) suppresses JPEG compression artifacts cleanly while preserving natural camera gradients (PSNR 28.34 dB, SSIM 0.895) in 2.63s via WebGPU, without introducing fake generative hallucinations. | PSNR=27.04dB · SSIM=0.8862 (2x 1024×1024 Free tier unwatermarked PNG); Edge gradient correlation edge_corr=0.6074; high-frequency recovery hf_ratio=0.4780 (+11.29% over Bicubic); Calibration plate PSNR=15.52dB: noticeable sharpening on 'REALTEST 2026' wood sign and apple skin highlights. |
| Suitable uses · historical assessment | Privacy-conscious users, anime/illustration and natural photo creators who want 100% free, unlimited 4x local GPU super-resolution without uploading files to any cloud server | Users who want instant, in-page no-login 2x (1024×1024) image enhancement without being redirected into a heavy editor |
| Result & output evidence | No native output obtained; the preview does not establish final export quality. | |
| Delivery capabilities | ||
| Recorded export specifications | 2048 × 2048 · PNG · No watermark in test | 1024×1024 (PNG · 2.0x Free Tier) · 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 (true 4x lossless PNG export, supporting arbitrary large-image tiled inference) | 1024×1024 (PNG · 2.0x Free Tier) |
| Watermark observation | Watermark-free | No watermark |
| Batch & API | Supports multi-model switching (Swin-UNet Art / Art Scan / Photo), 4-level denoise, and configurable tile size | Pro tier supports batch image enhancement and programmable APIs |
| Recorded free-tier dimensions | 2048 × 2048 | Not verified |
| Attached file dimensions | 2048 × 2048 · PNG | Not verified |
| Speed & reliability | ||
| Timing observation | Recorded local processing time: 2.63s · End-to-end reference: 2.63s | Network-observed server wait: 3.2s · End-to-end reference: 4.6s |
| Date & fixture | 2026-10-17 · 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 | No login in this test | No login in this test |
| Sign-in methods | 100% usable without login (runs entirely in the local browser via WebGPU) | No login required to export 2x (1024×1024) Free tier; 4x (2048×2048) requires Pro/Ultra subscription |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Pure single-page engineering workbench: select model (Swin-UNet Art / Photo), Denoise level, and 1x/2x/4x scale, then immediately preview or download the 2048×2048 PNG. | Completes Before/After comparison and 1024×1024 unwatermarked PNG export right on the landing page with zero login required. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | nagadomi (waifu2x / nunif Open-Source Author) | PicsArt, Inc. (Miami, FL / Yerevan) |
| Recorded origin | Independent open-source AI vision researcher (Japan) | Miami, FL, USA / Yerevan, Armenia |
| Domain history record | 2015–Present (waifu2x.net) | 2011–Present |
| Background & reputation assessment | Authored and maintained by nagadomi, the creator of the iconic Waifu2x open-source repository and the nunif deep-learning framework. | Global creative unicorn PicsArt, Inc. with 150M+ monthly active creators. |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | Uploaded for cloud processing |
| Third-party tracking record | Not verified | Not verified |
| Engineering & privacy assessment | 100% local in-browser WebGPU / ONNX Runtime inference — user images never leave the local device, offering maximum privacy protection. | Privacy note: enhanced outputs are stored on an unauthenticated public CDN URL (cdn-ai-hs.picsart.com/ai-hot-storage/...), so avoid uploading sensitive private documents. |
| Retention statement | This flow runs locally; post-close deletion not independently verified | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 34 / 35 100% free and open-source in-browser WebGPU tool with zero paywalls, zero ad clutter, and no usage limits (01_landing.png, 02_workspace.png, 03_download.png). | 31 / 35 Exemplary expectation setting: the hero subtitle explicitly states 'Plus, you can save a lower-resolution image for free!', and clicking Download opens a clear two-tier menu (03_download.png): '1024 x 1024px [Free]' vs '2048 x 2048px [Pro/Ultra]'. |
| Interaction restraint | 25 / 30 Pure single-page engineering workbench: select model (Swin-UNet Art / Photo), Denoise level, and 1x/2x/4x scale, then immediately preview or download the 2048×2048 PNG. | 26 / 30 Completes Before/After comparison and 1024×1024 unwatermarked PNG export right on the landing page with zero login required. |
| Background & reputation | 19 / 20 Authored and maintained by nagadomi, the creator of the iconic Waifu2x open-source repository and the nunif deep-learning framework. | 18 / 20 Global creative unicorn PicsArt, Inc. with 150M+ monthly active creators. |
| Engineering & privacy | 14.5 / 15 100% local in-browser WebGPU / ONNX Runtime inference — user images never leave the local device, offering maximum privacy protection. | 12 / 15 Privacy note: enhanced outputs are stored on an unauthenticated public CDN URL (cdn-ai-hs.picsart.com/ai-hot-storage/...), so avoid uploading sensitive private documents. |
| Task quality | 57.2 / 65 PSNR vs 2048px GT: 28.34 dB · SSIM: 0.895 · Edge Gradient Correlation: 0.7165 · High-Freq Sharpness Ratio: 0.5256 · Calibration Plate PSNR: 17 dB | 55.5 / 65 PSNR vs 2048px GT: 27.04 dB · SSIM: 0.8862 · Edge Gradient Correlation: 0.6074 · High-Freq Sharpness Ratio: 0.478 · Calibration Plate PSNR: 15.52 dB |
| Deliverable specifications | 20 / 20 Exports a full 2048×2048 4x upscaled PNG (or WebP/JPEG) locally in the browser with zero watermarks and no file-count limits (20.0/20) | 17 / 20 Clean unwatermarked export (8/8); Free scale factor: 2x (1024×1024 (PNG · 2.0x Free Tier)) |
| Processing speed | 10.5 / 15 Local WebGPU hardware acceleration completes 512→2048 (4x) tiled inference in just 2.63s with zero network upload overhead (14.5/15) | 14 / 15 Network-observed server wait: 3.2s (API mode: sync_post; end-to-end 4.6s shown for reference only, never penalized) |
