Unlimited:Waifu2x
Image upscaling online tool operated by nagadomi (waifu2x / nunif Open-Source Author) (Completely free)
Product node overview & trust baseline
Operator provenance, privacy baseline and site-wide pricing belong directly to the product node and are inherited across linked task edgesUnlimited:Waifu2x, operated by nagadomi (waifu2x / nunif Open-Source Author) (Independent open-source AI vision researcher (Japan)) under a "Completely free" model, scored 89/100 in our image upscaling benchmark. Overall finding: Free open-source, login-free on-device processing gives good 4× detail; a dismissible rewarded-ad prompt may appear on first use.
Independent open-source AI vision researcher (Japan) · 2015–Present (waifu2x.net)
Provenance baseline: 19/20 · Authored and maintained by nagadomi, the creator of the iconic Waifu2x open-source repository and the nunif deep-learning framework.
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.
Pricing transparency baseline: 34/35 · Cancellation: Completely free open-source-powered tool with no accounts or subscription charges.
Zero server upload — all pixel data remains strictly inside local browser memory
No third-party services listed in this record; this is not proof that none exist.
Product-level pricing & rules baseline
Verified plans, billing periods and cancellation terms owned by this product node; task-specific credit costs and free export limits are detailed per capability edge belowunlimited:waifu2x in-browser AI image upscaler · 2026-10-21
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 record
Completely free open-source-powered tool with no accounts or subscription charges.
unlimited:waifu2x official page ↗ · 2026-10-21 Capture 1 ↗
Archived official pricing sources: unlimited:waifu2x official page (2026-10-21) [text snapshot ↗]
Capability map & linked task edges
Whenever a capability passes fixed-fixture testing, an edge is automatically linked between this product node and the task topic for horizontal comparison.
| Linked task edge | Score | Assessment · historical test | Test scope & delivery | Inspect capability / follow edge |
|---|---|---|---|---|
| Image upscaling | 89/100 | Free open-source, login-free on-device processing gives good 4× detail; a dismissible rewarded-ad prompt may appear on first use. | 2048 × 2048 · PNG Historical test · 2026-10-17 Guest flow · Fixed low-resolution fixture · Output attached |
Tested task edges (with scores and native artifacts) are strictly separated from discovered untested capabilities (unscored).
Peer product comparison across shared task edges
Matched by overlapping tested task edges; compare site-wide billing models alongside per-task benchmark scoresThe official pricing page and credit table state that guests get 5 free runs and registered Free accounts receive 10 one-time Nero Credits (Standard/Photo/Anime 2× costs 1 credit/image, 4× costs 2 credits/image, paid-only 8× costs 4 credits/image). Standard monthly is USD 21.95/month promotional (regular USD 24.99/month, 300 credits/month). The yearly promo banner displays only "7.66 USD per month" (3,000 credits/year) without printing the annual invoice total before login, so the annual total is marked unverified.
- Image upscaling：Unlimited:Waifu2x 89/100 vs Nero AI 84/100
Actual annual charges $59.99/$263.99. A 3-day trial is offered; cancel before expiry to avoid charges. Exact daily free count is unspecified. The 11,500-credit pack includes a current 1,500-credit bonus.
- Image upscaling：Unlimited:Waifu2x 89/100 vs PicWish 82/100
High-volume tiers expanded; removal costs 1 credit/image, other operations differ. Taxes are not stated on the cards.
- Image upscaling：Unlimited:Waifu2x 89/100 vs Cutout.pro 87/100
Actual annual amounts are $77/$278/$854. Absolute removal quotas and per-image credit usage are unpublished; 1×/5×/20× cannot be converted into image counts.
- Image upscaling：Unlimited:Waifu2x 89/100 vs Img2Go 84/100
Linked capability test: Image upscaling
2026-10-17 · Native output attached. Findings cover the recorded fixture and conditions; paid specifications may be untested.
Task quality
Tested scale 4×
Detailed facts & historical record
- Measured fixture results
Tested scale: 4×
- Fixture findings
Ran 4× upscaling locally with noise reduction and text retention; speed depends on the device.
- 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.
- 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
- Result & output evidence
Delivery capabilities
2048 × 2048 · PNG · No watermark in test
Detailed facts & historical record
- Recorded export specifications
2048 × 2048 · PNG · No watermark in test
- Historical specification note · not an official maximum
2048 × 2048 (true 4x lossless PNG export, supporting arbitrary large-image tiled inference)
- Watermark observation
Watermark-free
- Batch & API
Supports multi-model switching (Swin-UNet Art / Art Scan / Photo), 4-level denoise, and configurable tile size
- Recorded free-tier dimensions
2048 × 2048
- Attached file dimensions
2048 × 2048 · PNG
Speed & reliability
About 2.63s end to end in this run; reliability not retested
Detailed facts & historical record
- Timing observation
Recorded local processing time: 2.63s · End-to-end reference: 2.63s
- Date & fixture
2026-10-17 · anchor_upscale_v1 · US-West (California, AS2914)
- Repeated tests & reliability
No standardized repetition count, success rate or variability range is recorded.
Interaction experience
No login in this run
Detailed facts & historical record
- Account requirements
No login in this test
- Sign-in methods
100% usable without login (runs entirely in the local browser via WebGPU)
- Manual adjustment
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.
Background & reputation
nagadomi (waifu2x / nunif Open-Source Author) · Long-term reputation not independently verified
Detailed facts & historical record
- Service lifecycle notice
Not verified
- Operator
nagadomi (waifu2x / nunif Open-Source Author)
- Recorded origin
Independent open-source AI vision researcher (Japan)
- Domain history record
2015–Present (waifu2x.net)
- Background & reputation assessment
Authored and maintained by nagadomi, the creator of the iconic Waifu2x open-source repository and the nunif deep-learning framework.
- External reputation record
Not verified
Engineering & privacy
On-device processing；This flow runs locally; post-close deletion not independently verified
Detailed facts & historical record
- Processing location
On-device processing
- Third-party tracking record
Not verified
- Engineering & privacy assessment
100% local in-browser WebGPU / ONNX Runtime inference — user images never leave the local device, offering maximum privacy protection.
- Retention statement
This flow runs locally; post-close deletion not independently verified
Task free allowance & pricing disclosure
Unlimited local WebGPU runs with zero daily caps or credit deductions
Explicitly discloses WebGPU browser requirements and model options at the top of the page
Site-wide plans belong to the product node (see Product-level pricing baseline ↑).
Expand site-wide plans aligned for Image upscaling (1 records)
unlimited:waifu2x in-browser AI image upscaler · 2026-10-21
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 record
Completely free open-source-powered tool with no accounts or subscription charges.
unlimited:waifu2x official page ↗ · 2026-10-21 Capture 1 ↗
Evaluation basis & full scores · Overall 89.1/100
Overall = honesty & reputation × 30% + capability × 70%. Component maxima follow this report’s rubric. List scores are rounded for display; original precision is retained here.
Scoring version 2.3.1 · Test fixture anchor_upscale_v1
Honesty & reputation · 92.5/100 · 30%
| Criterion | Score | Rationale | 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). | Evidence A → |
| 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. | Evidence A → |
| Background & reputation | 19 / 20 | Authored and maintained by nagadomi, the creator of the iconic Waifu2x open-source repository and the nunif deep-learning framework. | Evidence A → |
| Engineering & privacy | 14.5 / 15 | 100% local in-browser WebGPU / ONNX Runtime inference — user images never leave the local device, offering maximum privacy protection. | Evidence A → |
Capability · 87.7/100 · 70%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| 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 | Evidence A → |
| 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) | Evidence A → |
| 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) | Evidence A → |
Legacy scores may include advertised maximum capabilities. Read tested output separately from paid capabilities. Records without matching tiers and scope are not ranked together.
Developer & citation kit · Claim updates, request benchmarks & embed verified badges
Product developers and writers can embed these SVG badges in official websites, GitHub READMEs or documentation, or use the channels below to sync product-wide plans and capabilities.
[](https://realtest.org/tools/unlimited.waifu2x.net/) <a href="https://realtest.org/tools/unlimited.waifu2x.net/"><img src="https://realtest.org/badges/unlimited.waifu2x.net.svg" alt="Unlimited:Waifu2x — RealTest" height="24" /></a> 
[](https://realtest.org/tools/unlimited.waifu2x.net/#feature-image-upscaler)