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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 | DupliChecker | PicWish | Switch / compare |
|---|---|---|---|
| Background removal | Not tested in topic | 83/100 2048 × 2048 · PNG | Compare in task topic → |
| Image compression | 90/100 2048 × 2048 · PNG | 73/100 JPEG · Output attached | Active task |
| Image upscaling | Not tested in topic | 82/100 1280×1280 (2.5x free unwatermarked) / 2048×2048 (4.0x preview carries bottom notice watermark) · Historical description; output not attached | Compare in task topic → |
| Object removal | Not tested in topic | 84/100 2048 × 2048 · PNG | Compare in task topic → |
| Image generation | Not tested in topic | 85/100 JPEG · Output attached | Compare in task topic → |
| Photo restoration | Not tested in topic | 56/100 JPEG · Output attached | Compare in task topic → |
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Browse this task →| Criterion | DupliChecker Image Compressor Image compression 90/100 Seven-aspect task score Upfront free limits and login-free batch downloads accompany roughly halved PNG size; each image is capped at 5MB amid many ads and tool links. Tested export 2048 × 2048 · PNG Historical test · 2026-10-19 | PicWish Image Compressor Image compression 73/100 Seven-aspect task score Signed-in free accounts can download full-resolution compressed images with fast processing and substantial size reduction, but guest downloads hit a login modal and PNG inputs are converted to JPEG. Tested export JPEG · Output attached Historical test · 2026-10-19 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | DupliChecker online Image Compressor tool (excludes separate Plagiarism, Paraphrasing, and Reverse Image Search plans) · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Image Compressor Free2026-10-21 ↗ Free Free Free Free without login; up to 10 images per batch, max 5 MB each (JPG/JPEG/PNG). 1 plan / billing-period records, all listed; — means that period is not recorded. The Image Compressor page explicitly states "100% Free" and supports up to 10 images per batch at max 5 MB each (JPG/JPEG/PNG) without login. Site-wide Pricing links cover Plagiarism, Paraphrasing, and Reverse Image Search quotas; image compression requires no subscription. Cancellation, sources & verification recordThe Image Compressor tool is free to use and involves no subscription charges. DupliChecker official online Image Compressor page ↗ · 2026-10-21 Capture 1 ↗ | Web free, weekly/monthly/annual subscriptions and expanded packs; excludes API · 2026-10-20 Plan · source date Monthly / one-time Annual bill / period Quota & limits Pro2026-10-20 ↗ USD 5.99/week Other period Other period 50 credits/week; 50 core-feature HD downloads/day Rules [1] Pro2026-10-20 ↗ USD 9.99/month USD 59.99/year Monthly 350 credits/month; 50 core-feature HD downloads/day Rules [1] Annual 350 credits/month; 50 core-feature HD downloads/day Rules [1] Max2026-10-20 ↗ USD 26.99/month USD 263.99/year Monthly 2,000 credits/month; 15,000 HD downloads/month Rules [1] Annual 2,000 credits/month; 15,000 HD downloads/month Rules [1] 300 credits2026-10-20 ↗ USD 12.99 · one-time payment Usage / one-time Usage / one-time 300 credits; 1 per removal; not for API Rules [2] 1,000 credits2026-10-20 ↗ USD 33.99 · one-time payment Usage / one-time Usage / one-time 1,000 credits; 1 per removal; not for API Rules [2] 5,000 credits2026-10-20 ↗ USD 65.99 · one-time payment Usage / one-time Usage / one-time 5,000 credits; 1 per removal; not for API Rules [2] 11,500 credits2026-10-20 ↗ USD 99.95 · one-time payment Usage / one-time Usage / one-time 11,500 credits; 1 per removal; not for API Rules [2] 30,000 credits2026-10-20 ↗ USD 269.99 · one-time payment Usage / one-time Usage / one-time 30,000 credits; 1 per removal; not for API Rules [2] 80,000 credits2026-10-20 ↗ USD 639.99 · one-time payment Usage / one-time Usage / one-time 80,000 credits; 1 per removal; not for API Rules [2] 13 plan / billing-period records, all listed; — means that period is not recorded. 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. Cancellation, sources & verification recordCancel under My Orders; request refunds through official support, eligibility not separately verified. Official plans and usage terms ↗ · 2026-10-20 Capture 1 ↗ · Capture 2 ↗ · Capture 3 ↗ · Capture 4 ↗ |
| Free & trial allowance on the test date | Free guests can upload up to 10 images per batch, max 5 MB per image | Compressed canonical 4,237,170-byte PNG to 1,447,201 bytes; downloaded 2048×2048 JPEG (-65.85%) after free Google sign-in. |
| Cancellation & refunds | The Image Compressor tool is free to use and involves no subscription charges. | Cancel under My Orders; request refunds through official support, eligibility not separately verified. |
| Disclosure of costs & limits | 'Upload Up to 10 images, max 5MB each' is printed directly inside the upload box | Not verified |
| Task quality | ||
| Measured fixture results | File reduction: 53.34% · Output size: 1930.7 KB | File reduction: 65.85% · Output size: 1413.3 KB |
| Fixture findings | Reduced this fixture by about 53% without login or a watermark; the page contains many surrounding links. | Retained 2000x2000 dimensions with ~91% file size reduction; the PNG input was converted to lossy JPEG. |
| Original historical observation | While DupliChecker's page has many SEO cross-links, its core compression pipeline is solid: shrinking our 4.14 MB anchor PNG by 53.34% to 1.89 MB at PSNR=39.54 dB and SSIM=0.9985 with no login required (02_workspace.png, 03_download.png). | Compressed canonical PNG to 1,447,201-byte 2048×2048 JPEG (-65.85%, PSNR=47.03 dB, SSIM=0.9997) after free Google sign-in. |
| Suitable uses · historical assessment | Users who want quick no-login compression for PNG/JPEG files under 5 MB with manual quality slider control | Not verified |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | 2048 × 2048 · PNG · No watermark in test | JPEG · Output attached · Check watermark record |
| Historical specification note · not an official maximum | 2048×2048 (native resolution watermark-free PNG direct export) | Not verified |
| Watermark observation | Watermark-free | Not verified |
| Batch & API | Supports 10-image batch upload and one-click Download All | Not verified |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | 2048 × 2048 · PNG | Not verified |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 5.4s · End-to-end reference: 7.6s | Network-observed server wait: 1.43s · End-to-end reference: 3.54s |
| Date & fixture | 2026-10-19 · anchor_compress_v1 · US-West (California, AS2914) | 2026-10-19 · anchor_compress_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 | Not verified |
| Sign-in methods | No login required | Google or email login required when clicking Download Image |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Supports no-login single or Download All batch export, though the surrounding page layout is cluttered with internal SEO tool links and ad slots. | Uses a post-processing login wall at the download step and devotes half the result panel to promoting the desktop app. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | DupliChecker (duplichecker.com) | AI Image Tool Matrix (Wangxu Tech / Apowersoft) |
| Recorded origin | Multi-Tool Web Portal | Not verified |
| Domain history record | 2006–Present (20-year utility portal) | Not verified |
| Background & reputation assessment | Long-standing SEO and text/image utility portal (duplichecker.com) operating since 2006. | Operated by Wangxu Technology (HK) Co., Limited (Apowersoft). |
| 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 | Delivers compressed outputs via temporary AWS S3 buckets (temp-ca.s3.amazonaws.com) and states that temporary files are automatically purged. | HTTPS upload to Alibaba Cloud OSS plus gw.aoscdn.com async task queue; requires account login to retrieve the compressed file. |
| Retention statement | Explicit retention period unconfirmed; inspect policy record | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 31 / 35 Clearly states free tier limits inside the dropzone ('Upload Up to 10 images, max 5MB each.', 01_landing.png); uploading our 4.14 MB anchor PNG and clicking Compress Image immediately reveals a free 'Save -53% (1.89 MB)' download button with zero paywalls (02_workspace.png, 03_download.png). | 15 / 35 Landing page headlines "Free Online Image Compressor — Compress images with one click" and lets guests upload and preview the compression ratio (4.04MB to 1.38MB), but clicking Download Image opens a login gate; after free Google sign-in, the 2048×2048 image downloads without payment, while batch mode and custom settings require the desktop app. |
| Interaction restraint | 24.5 / 30 Supports no-login single or Download All batch export, though the surrounding page layout is cluttered with internal SEO tool links and ad slots. | 12 / 30 Uses a post-processing login wall at the download step and devotes half the result panel to promoting the desktop app. |
| Background & reputation | 16.5 / 20 Long-standing SEO and text/image utility portal (duplichecker.com) operating since 2006. | |
| Engineering & privacy | 12.5 / 15 Delivers compressed outputs via temporary AWS S3 buckets (temp-ca.s3.amazonaws.com) and states that temporary files are automatically purged. | 10 / 15 HTTPS upload to Alibaba Cloud OSS plus gw.aoscdn.com async task queue; requires account login to retrieve the compressed file. |
| Task quality | 60.2 / 65 Preserves native 2048×2048 PNG format while reducing 4,137.9 KB to 1,930.7 KB (53.34% reduction, 2.14× ratio) with PSNR = 39.54 dB and SSIM = 0.9985 (60.2/65) | 53 / 65 Compressed the 4,237,170-byte (4,137.9 KB) canonical PNG to a 1,447,201-byte (1,413.3 KB) 2048×2048 JPEG (-65.85%, 2.93x ratio) with PSNR=47.03 dB and SSIM=0.9997 on opaque RGB content, though converting the container format from PNG to JPEG. |
| Deliverable specifications | 20 / 20 100% preserves 2048×2048 pixel dimensions and native PNG format without watermarks or login (20.0/20) | 14 / 20 Signed-in free account downloads a full 2048×2048 watermark-free file, but guest download is blocked by a login modal and PNG is transcoded to JPEG. |
| Processing speed | 11.8 / 15 Cloud upload and AWS S3 compressed delivery complete in ~7.6s (~5.4s server processing) (11.8/15) | 14.5 / 15 2026-10-21 single-sample network timing: OSS PUT upload 1.80s, async compression task (r40 to r43) server wait 1.43s, end-to-end 3.54s. |
