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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 | Leonardo.Ai | Switch / compare |
|---|---|---|---|
| Background removal | Not tested in topic | 86/100 2048 × 2048 · PNG | Compare in task topic → |
| Image upscaling | 89/100 2048 × 2048 · PNG | 78/100 1024×1024 (2.0x · Unwatermarked high-quality JPG · 271.9 KB) · Historical description; output not attached | Active task |
| Object removal | Not tested in topic | 88/100 2048×2048 (Native full-resolution watermark-free PNG) · Historical description; output not attached | Compare in task topic → |
| Image generation | Not tested in topic | 88/100 1024×1024 (Unwatermarked JPEG, 147.5KB, 100% pixel retention) · Historical description; output not 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 | Leonardo.Ai (Universal Upscaler · Pro Precise) Image upscaling 78/100 Seven-aspect task score Credit costs and sizes are shown upfront with clear comparison controls; free output is 2× and images are public by default, with private mode paid. Tested export 1024×1024 (2.0x · Unwatermarked high-quality JPG · 271.9 KB) · 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 individual and default three-seat team plans; excludes API · 2026-10-20 Plan · source date Monthly / one-time Annual bill / period Quota & limits Essential2026-10-20 ↗ 2026-10-20 ↗ USD 12/month USD 120/year Monthly 8,500 Fast Tokens/month; token bank 25,500 Annual 8,500 Fast Tokens/month Rules [1] Premium2026-10-20 ↗ 2026-10-20 ↗ USD 30/month USD 288/year Monthly 25,000 Fast Tokens/month; token bank 75,000 Annual 25,000 Fast Tokens/month Rules [1] Ultimate2026-10-20 ↗ 2026-10-20 ↗ USD 60/month USD 576/year Monthly 60,000 Fast Tokens/month; token bank 180,000 Annual 60,000 Fast Tokens/month Rules [1] 10 plan / billing-period records, all listed; — means that period is not recorded. The app payment panel confirms personal annual prices of $120/$288/$576, differing from earlier rounded monthly equivalents on the marketing site. Public plans permit paid users to buy top-ups without quoting pack prices or per-removal token cost. Unlimited relaxed generation does not establish unlimited removal. Verification has gaps; unknown prices and quotas are not inferred. Cancellation, sources & verification recordSelf-serve cancellation in account settings Official plans and usage terms ↗ · 2026-10-20 Capture 1 ↗ · Capture 2 ↗ Official app annual payment selection ↗ · 2026-10-20 Capture 1 ↗ · Capture 2 ↗ · Capture 3 ↗ |
| Free & trial allowance on the test date | Unlimited local WebGPU runs with zero daily caps or credit deductions | Free accounts receive 150 daily resetting Fast Tokens; Universal Upscaler (Pro · Precise · 2x) costs 5 Tokens per image (~30 free upscales per day) |
| Cancellation & refunds | Completely free open-source-powered tool with no accounts or subscription charges. | Self-serve cancellation in account settings |
| Disclosure of costs & limits | Explicitly discloses WebGPU browser requirements and model options at the top of the page | Displays 'Upscale 🪙 5' and target output '1024 × 1024px 1 MP' upfront before clicking Upscale (Screenshot ②) |
| 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. | Added detail while retaining overall structure; check newly generated texture against the input. |
| 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=25.77 dB · SSIM=0.9605 · edge_corr=0.6507 · hf_ratio=0.7040: unlike diffusive enhancers that heavily alter lighting and geometry, Leonardo's Aurora Precise mode injects rich high-frequency detail while preserving 0.9605 SSIM structural consistency. |
| 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 | Designers and AI artists who want the best balance between generative micro-texture sharpening (`hf_ratio=0.7040`) and structural fidelity (`SSIM=0.9605`), with ~30 free upscales per day |
| 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 (2.0x · Unwatermarked high-quality JPG · 271.9 KB) · 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 (2.0x · Costs 5 Free Fast Tokens · Unwatermarked JPG) |
| Watermark observation | Watermark-free | None (Completely unwatermarked) |
| Batch & API | Supports multi-model switching (Swin-UNet Art / Art Scan / Photo), 4-level denoise, and configurable tile size | Supports Legacy / Ultra / Pro modes, Precise / Creative styles, and production REST API |
| 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: 14.2s · End-to-end reference: 16.8s |
| 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 | Account required in this test |
| Sign-in methods | 100% usable without login (runs entirely in the local browser via WebGPU) | Requires Google / Apple / Microsoft / Email login |
| 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. | Clean `/universal-upscaler` studio workspace with zero credit-card trial popups or countdown banners, offering Compare, Side-by-side, and Single inspection views. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | nagadomi (waifu2x / nunif Open-Source Author) | Leonardo Interactive Pty Ltd (Canva) |
| Recorded origin | Independent open-source AI vision researcher (Japan) | Sydney, Australia |
| Domain history record | 2015–Present (waifu2x.net) | 2022–Present |
| Background & reputation assessment | Authored and maintained by nagadomi, the creator of the iconic Waifu2x open-source repository and the nunif deep-learning framework. | Developed by Leonardo Interactive Pty Ltd (Sydney, Australia; acquired by Canva in 2024), powered by its proprietary Aurora Precise / Creative super-resolution models. |
| 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. | Free plan creations and upscales are public by default; private mode requires upgrading to Essential ($10/mo). |
| 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). | 29 / 35 Transparent token pricing and deliverable specs: the right-hand panel clearly displays 'Output: 1024 × 1024px (1 MP)' and 'Upscale 🪙 5' (consuming only 5 of the 150 daily free Fast Tokens, see Screenshot ②), and exports a completely unwatermarked 1024×1024 image. |
| 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. | 24 / 30 Clean `/universal-upscaler` studio workspace with zero credit-card trial popups or countdown banners, offering Compare, Side-by-side, and Single inspection views. |
| 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 Developed by Leonardo Interactive Pty Ltd (Sydney, Australia; acquired by Canva in 2024), powered by its proprietary Aurora Precise / Creative super-resolution models. |
| Engineering & privacy | 14.5 / 15 100% local in-browser WebGPU / ONNX Runtime inference — user images never leave the local device, offering maximum privacy protection. | 10 / 15 Free plan creations and upscales are public by default; private mode requires upgrading to Essential ($10/mo). |
| 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 | 52.8 / 65 PSNR vs 2048px GT: 25.77 dB · SSIM: 0.9605 · Edge Gradient Correlation: 0.6507 · High-Freq Sharpness Ratio: 0.704 · Calibration Plate PSNR: 14.57 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) | 15 / 20 Clean unwatermarked export (8/8); Free scale factor: 2x (1024×1024 (2.0x · Costs 5 Free Fast Tokens · Unwatermarked JPG)) |
| 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) | 8.5 / 15 Network-observed server wait: 14.2s (API mode: async_poll; end-to-end 16.8s shown for reference only, never penalized) |
