See your options side by side
Choose one task and 2–4 tools. Compare pricing, output, test results and trust.
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 | Depositphotos | Switch / compare |
|---|---|---|---|
| Background removal | Not tested in topic | 69/100 2048 × 2048 · PNG | Compare in task topic → |
| Image upscaling | 89/100 2048 × 2048 · PNG | 81/100 1024×1024 (JPG · 2.0x Unwatermarked) · Historical description; output not attached | Active task |
Select at least 2 tools to compare
You can also filter a task page first, then compare your shortlist.
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 | Depositphotos (Free Image Upscaler) Image upscaling 81/100 Seven-aspect task score Free login-free downloads are fast, but input is JPG-only and a notification prompt appears; fine-edge improvement at 2× was limited in this run. Tested export 1024×1024 (JPG · 2.0x Unwatermarked) · 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 ↗ | This web background remover; excludes desktop software and stock subscriptions · 2026-10-20 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free web tool2026-10-20 ↗ Free Free Free Officially free background removal with transparent PNG output Inputs up to 30MB; free export size and count not specified 1 plan / billing-period records, all listed; — means that period is not recorded. Inputs up to 30MB; free export size and count not specified Cancellation, sources & verification recordCredit packs remain valid for 1 year; subscriptions can be cancelled anytime in account settings Official plans and usage terms ↗ · 2026-10-20 Capture 1 ↗ |
| Free & trial allowance on the test date | Unlimited local WebGPU runs with zero daily caps or credit deductions | Completely free with no login (fixed 2x scale, 15MB max file size, JPEG/JPG input only) |
| Cancellation & refunds | Completely free open-source-powered tool with no accounts or subscription charges. | Credit packs remain valid for 1 year; subscriptions can be cancelled anytime in account settings |
| Disclosure of costs & limits | Explicitly discloses WebGPU browser requirements and model options at the top of the page | Upload box clearly states 'JPEG or JPG • 15MB max', though visiting the page immediately triggers a browser notification permission prompt |
| 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. | No obvious artifacts appeared in this 2× test; recovery of fine blurred edges remained limited. |
| 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=27.34dB · SSIM=0.8924 (2x 1024×1024 JPG); Mode A GT exposes the underlying algorithm: edge_corr=0.5740 and hf_ratio=0.4018 sit barely above standard non-AI Bicubic interpolation (0.5656 / 0.3651), proving its 0.60s speed comes from a lightweight CNN/unsharp filter rather than deep super-resolution; Calibration plate PSNR=15.60dB: artifact-free, but recovers significantly less high-frequency edge detail than iLoveIMG or Upscale.media. |
| 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 needing instant (0.6s), completely free no-login 2x JPG enlargement without deep high-frequency texture reconstruction |
| 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 (JPG · 2.0x Unwatermarked) · 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 (JPG · 2.0x Unwatermarked) |
| 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 | Single JPEG upload only; no batch or 4x options |
| 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: 0.6s · End-to-end reference: 3.32s |
| 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) | 100% free no-login 2x (1024×1024) JPG export, but strictly accepts JPEG/JPG uploads only (rejects PNG) |
| 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. | Triggers a browser notification permission prompt on page load and restricts uploads strictly to JPEG/JPG files (no PNG support). |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | nagadomi (waifu2x / nunif Open-Source Author) | Depositphotos Inc. (Vista / Cimpress Group) |
| Recorded origin | Independent open-source AI vision researcher (Japan) | New York, NY, USA |
| Domain history record | 2015–Present (waifu2x.net) | 2009–Present |
| Background & reputation assessment | Authored and maintained by nagadomi, the creator of the iconic Waifu2x open-source repository and the nunif deep-learning framework. | Operated by New York stock photography giant Depositphotos Inc. (part of Vista / Cimpress). |
| 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. | Fastest Network-observed server wait at 0.60s, backed by an explicit 24-hour automatic file deletion policy. |
| Retention statement | This flow runs locally; post-close deletion not independently verified | Claims deletion within 24 hours; deletion not independently verified |
| 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 Zero paywalls or credit traps: unlike its paywalled Text-to-Image tool, Depositphotos' Upscaler is a 100% free utility exporting unwatermarked 1024×1024 JPGs with no login. |
| 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. | 23 / 30 Triggers a browser notification permission prompt on page load and restricts uploads strictly to JPEG/JPG files (no PNG support). |
| Background & reputation | 19 / 20 Authored and maintained by nagadomi, the creator of the iconic Waifu2x open-source repository and the nunif deep-learning framework. | 19 / 20 Operated by New York stock photography giant Depositphotos Inc. (part of Vista / Cimpress). |
| Engineering & privacy | 14.5 / 15 100% local in-browser WebGPU / ONNX Runtime inference — user images never leave the local device, offering maximum privacy protection. | 14 / 15 Fastest Network-observed server wait at 0.60s, backed by an explicit 24-hour automatic file deletion policy. |
| 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 | 48 / 65 PSNR vs 2048px GT: 27.34 dB · SSIM: 0.8924 · Edge Gradient Correlation: 0.574 · High-Freq Sharpness Ratio: 0.4018 · Calibration Plate PSNR: 15.6 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) | 16 / 20 Clean unwatermarked export (8/8); Free scale factor: 2x (1024×1024 (JPG · 2.0x Unwatermarked)) |
| 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) | 15 / 15 Network-observed server wait: 0.6s (API mode: sync_post; end-to-end 3.32s shown for reference only, never penalized) |
