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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 | Bigjpg | VanceAI | Switch / compare |
|---|---|---|---|
| Background removal | Not tested in topic | 84/100 1673 × 1673 · PNG | Compare in task topic → |
| Image upscaling | 89/100 2048 × 2048 · PNG | 88/100 PNG · Output attached | Active task |
| Photo restoration | Not tested in topic | 77/100 JPEG · Output attached | Compare in task topic → |
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Browse this task →| Criterion | Bigjpg (AI Super-Resolution Image Enlarger) Image upscaling 89/100 Seven-aspect task score Free login-free 4× output offers adjustable denoising and clear upgrade limits; detail is retained well, with about 18.5 seconds of free processing in this run. Tested export 2048 × 2048 · PNG Historical test · 2026-10-17 | VanceAI Image Upscaler (Picture Studio) Image upscaling 88/100 Seven-aspect task score Login-free trials deliver 4× watermark-free output with processing and save credit notices; credits are limited and files remain for seven days unless deleted. Tested export PNG · Output attached Historical test · 2026-10-17 |
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| Pricing & rules | ||
| Pricing plans | Bigjpg web and app plans (Free / Basic 2-month / Standard half-year / Pro annual); CNY · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-21 ↗ Free Free Free Available without login; 20 images/month, max 5 MB per file, up to 4x unwatermarked upscaling on shared servers. Basic (2 Months)2026-10-21 ↗ CNY 35 · one-time payment Usage / one-time Usage / one-time CNY 35 for 2 months (500 images/month); max 50 MB per image, up to 16x upscaling, dedicated high-performance server, and batch processing. Valid for 2 months from purchase Standard (6 Months)2026-10-21 ↗ CNY 69/6 months Other period Other period CNY 69 for 6 months (1,000 images/month); max 50 MB per image, up to 16x upscaling, dedicated high-performance server, and batch processing. Pro (1 Year)2026-10-21 ↗ — CNY 138/year Annual CNY 138 for 1 year (2,000 images/month); max 50 MB per image, up to 16x upscaling, dedicated high-performance server, and batch processing. 4 plan / billing-period records, all listed; — means that period is not recorded. The official pricing modal lists Free (20 images/month, max 5 MB, up to 4x upscaling) and three fixed-term tiers: Basic CNY 35 for 2 months (500 images/month), Standard CNY 69 for 6 months (1,000 images/month), and Pro CNY 138 for 1 year (2,000 images/month). All paid tiers unlock up to 16x upscaling, 50 MB upload size, priority high-performance servers, and batch processing via WeChat Pay, Alipay, or Stripe. Cancellation, sources & verification recordPurchased for fixed periods (2 months, 6 months, or 1 year) via WeChat Pay, Alipay, or Stripe under official Terms of Service. Bigjpg official website and pricing table modal ↗ · 2026-10-21 Capture 1 ↗ | Web free, monthly, annual and pay-as-you-go; desktop and API separate · 2026-10-20 Plan · source date Monthly / one-time Annual bill / period Quota & limits Starter2026-10-20 ↗ USD 20/month USD 180/year Annual 260 credits/month Monthly 260 credits/month including a 30% bonus; removal 1 credit/image Popular2026-10-20 ↗ USD 40/month USD 360/year Annual 650 credits/month Monthly 650 credits/month including a 30% bonus; removal 1 credit/image Creator2026-10-20 ↗ USD 60/month USD 540/year Annual 1,300 credits/month Monthly 1300 credits/month including a 30% bonus; removal 1 credit/image Studio2026-10-20 ↗ USD 100/month USD 900/year Annual 2,600 credits/month Monthly 2600 credits/month including a 30% bonus; removal 1 credit/image Starter2026-10-20 ↗ USD 40 · one-time payment Usage / one-time Usage / one-time 200 credits; removal 1 credit/image Rules [1] Popular2026-10-20 ↗ USD 80 · one-time payment Usage / one-time Usage / one-time 500 credits; removal 1 credit/image Rules [1] Creator2026-10-20 ↗ USD 120 · one-time payment Usage / one-time Usage / one-time 1000 credits; removal 1 credit/image Rules [1] Studio2026-10-20 ↗ USD 200 · one-time payment Usage / one-time Usage / one-time 2000 credits; removal 1 credit/image Rules [1] 13 plan / billing-period records, all listed; — means that period is not recorded. Subscription credits include the current 30% bonus and roll over while subscribed, expiring when the subscription ends. Paid image inputs are limited to 10MB, 34MP and an 8000px long edge. Cancellation, sources & verification recordCancel anytime; remaining credits last until period end. A 7-day money-back guarantee is advertised, subject to terms. Official plans and usage terms ↗ · 2026-10-20 Capture 1 ↗ · Capture 2 ↗ · Capture 3 ↗ · Capture 4 ↗ |
| Free & trial allowance on the test date | Free tier allows 20 images/month up to 3000×3000px / 5MB at 2x or 4x with all 5 denoising levels and zero watermarks | New Picture Studio grants anonymous visitors 10 free trial credits (10/10 Free trial): 4x upscaling costs 1 credit and saving the unwatermarked 2048px image costs 2 credits (~3 full 2048px exports free) |
| Cancellation & refunds | Purchased for fixed periods (2 months, 6 months, or 1 year) via WeChat Pay, Alipay, or Stripe under official Terms of Service. | Cancel anytime; remaining credits last until period end. A 7-day money-back guarantee is advertised, subject to terms. |
| Disclosure of costs & limits | 8x and 16x options are transparently disabled in the settings modal before processing starts | Live credit counter in the top bar (10/10 → 8/10) plus itemized credit confirmation modal before every run |
| Task quality | ||
| Measured fixture results | Tested scale: 4× | Tested scale: 4× |
| Fixture findings | The tested 4× photo configuration produced smooth output with text retained; other settings remain untested. | Text and highlights looked natural in this 4× result; free use remains credit-limited. |
| Original historical observation | Configured to Photo + 4x + Low Noise Reduction, Bigjpg exported a clean 2048×2048 PNG scoring PSNR = 28.27 dB and SSIM = 0.9790 with smooth tonal transitions and zero generative hallucinations. | VanceAI 4x super-resolution achieves PSNR = 26.86 dB and SSIM = 0.9717 on our 512→2048 restoration benchmark (03_download.png), preserving natural wood-carved lettering, metallic highlights, and apple surface sheen with no-login unwatermarked delivery. |
| Suitable uses · historical assessment | Users wanting a no-login, zero-watermark 4x (2048px) upscaler with 5-level adjustable noise reduction for photos and illustrations | Designers and e-commerce users seeking no-login unwatermarked 4x/8x super-resolution combined with sharpening, denoising, or old-photo restoration |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | 2048 × 2048 · PNG · No watermark in test | PNG · Output attached · No watermark in test |
| Historical specification note · not an official maximum | 2048 × 2048 (Full 4x Unwatermarked PNG) | 2048 × 2048 (4x upscaled unwatermarked JPG) |
| Watermark observation | None (100% watermark-free) | No watermark (exports clean image directly after deducting trial credits) |
| Batch & API | Multi-image queue, Windows/Mac desktop apps, and REST API | Built-in Batch Processing Review queue, commercial REST API, and Windows local desktop client |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | 2048 × 2048 · PNG | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 18.5s · End-to-end reference: 20s | Network-observed server wait: 6.4s · End-to-end reference: 7.9s |
| Date & fixture | 2026-10-17 · anchor_upscale_v1 · US-West (California, AS2914) | 2026-10-17 · 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 | No login required; optional account login for history sync and parallel high-speed queues | 10 Free trial credits granted without login; also supports account login and PC desktop client |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Zero registration, zero popups, and zero watermarks: once processing completes, a green "Download (274.41 KB)" button directly exports the full 4x (2048×2048) PNG. | Allows selecting 2x / 4x / 8x scale factors inside Picture Studio and saving a clean 2048×2048 unwatermarked image without registration or credit card gates. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Bigjpg Team | VanceAI Technology |
| Recorded origin | Cross-Platform AI Super-Resolution Team (Launched 2017) | International R&D Team (VanceAI) |
| Domain history record | 2017–present (9+ years) | 2020–Present |
| Background & reputation assessment | Operating continuously since 2017 as one of the best-known Waifu2x / SRCNN deep convolutional super-resolution services across Web, Windows, macOS, iOS, Android, and API. | Official tool by VanceAI Technology (founded 2020, offering web cloud studio, VanceAI PC local desktop software, and commercial API). |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | Uploaded for cloud processing | Uploaded for cloud processing |
| Third-party tracking record | Not verified | Not verified |
| Engineering & privacy assessment | Supports offline queue recovery and one-click "Delete" to immediately purge uploaded/upscaled files from cloud storage. | Clearly states "Files are saved for 7 days. Please download them in time" in the bottom-left corner with a one-click Delete All button, delivering files via signed Cloudflare R2 links. |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 33 / 35 Anonymous guests can upload the 512×512 test image and open the clean configuration modal (Artwork/Photo, 2x/4x free, 5 noise reduction levels: None/Low/Medium/High/Highest), with only 8x/16x grayed out and labeled "Upgrade for 8x/16x" (02_workspace.png, 03_download.png). | 32 / 35 Anonymous visitors entering the new workspace (vanceai.com/workspace-new/) receive "10/10 Free trial" credits; clicking Process shows an upfront "Confirm batch processing (BALANCE 10 credits → AFTER 9 credits)" modal (02_workspace.png), and saving the 2048×2048 unwatermarked output clearly notes "Saved result · 2 credits" (03_download.png). |
| Interaction restraint | 28.5 / 30 Zero registration, zero popups, and zero watermarks: once processing completes, a green "Download (274.41 KB)" button directly exports the full 4x (2048×2048) PNG. | 28 / 30 Allows selecting 2x / 4x / 8x scale factors inside Picture Studio and saving a clean 2048×2048 unwatermarked image without registration or credit card gates. |
| Background & reputation | 18 / 20 Operating continuously since 2017 as one of the best-known Waifu2x / SRCNN deep convolutional super-resolution services across Web, Windows, macOS, iOS, Android, and API. | 18.5 / 20 Official tool by VanceAI Technology (founded 2020, offering web cloud studio, VanceAI PC local desktop software, and commercial API). |
| Engineering & privacy | 13 / 15 Supports offline queue recovery and one-click "Delete" to immediately purge uploaded/upscaled files from cloud storage. | 13.5 / 15 Clearly states "Files are saved for 7 days. Please download them in time" in the bottom-left corner with a one-click Delete All button, delivering files via signed Cloudflare R2 links. |
| Task quality | 56.5 / 65 4x Photo mode (Low noise reduction) exported a native 2048×2048 unwatermarked PNG achieving full-frame PSNR = 28.27 dB and SSIM = 0.9790, suppressing JPEG block artifacts while preserving clean structural geometry and color accuracy (56.5/65). | 55.5 / 65 PSNR vs 2048px GT: 26.86 dB · SSIM: 0.9717 · Edge Gradient Correlation: 0.4557 · High-Freq Sharpness Ratio: 0.5243 · Calibration Plate PSNR: 20.63 dB |
| Deliverable specifications | 20 / 20 Free guest tier directly exports full 4x (2048×2048) unwatermarked PNG (20.0/20). | 19 / 20 No free unwatermarked export (0/8); Free scale factor: 4x (2048 × 2048 (4x upscaled unwatermarked JPG)) |
| Processing speed | 10.5 / 15 Free cloud GPU 4x Photo super-resolution completed in ~18.5s (10.5/15). | 12 / 15 Network-observed server wait: 6.4s (API mode: cloud_gpu_r2; end-to-end 7.9s shown for reference only, never penalized) |
