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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 | youcompress.com | Switch / compare |
|---|---|---|---|
| Image compression | 90/100 2048 × 2048 · PNG | 89/100 2048 × 2048 · PNG | Active task |
| PDF compression | Not tested in topic | 78/100 PDF · Output attached | Compare in task topic → |
| Video compression | Not tested in topic | 95/100 MP4 · 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 | YouCompress Image compression 89/100 Seven-aspect task score 100% free with no login, compressing the 4.14 MB anchor by 65.65% to 1.39 MB in 4.27s with PSNR 34.97 dB and full-res transparent PNG export. Tested export 2048 × 2048 · PNG Historical test · 2026-11-04 |
|---|---|---|
| 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 ↗ | YouCompress 100% free web utility structure · 2026-10-30 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-30 ↗ Free Free Free 100% free without login, unlimited daily compressions, no watermarks Automated compression for videos, PDFs, MP3s, and PNG/JPG/GIF images 1 plan / billing-period records, all listed; — means that period is not recorded. All file compression utilities are 100% free without registration or usage quotas. Cancellation, sources & verification recordCancellation and refund terms unverified YouCompress Official Homepage ↗ · 2026-10-30 Capture 1 ↗ |
| Free & trial allowance on the test date | Free guests can upload up to 10 images per batch, max 5 MB per image | Not verified |
| Cancellation & refunds | The Image Compressor tool is free to use and involves no subscription charges. | Not 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: 65.65% · Output size: 1421.6 KB |
| Fixture findings | Reduced this fixture by about 53% without login or a watermark; the page contains many surrounding links. | Substantial 65.7% size reduction while fully preserving 2048px resolution and transparency without visual artifacts; fast and straightforward. |
| 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). | Uploading the standard 4.14 MB PNG anchor (anchor_compress_v1) to YouCompress (https://www.youcompress.com/images/) completed in 4.27s on cloud servers, displaying Completed: Download (4.04MB => 1.39MB, -65.65%), exporting a 1,421.6 KB PNG preserving 2048x2048 resolution, transparency, PSNR 34.97 dB, and SSIM 0.9956. |
| 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 | 2048 × 2048 · PNG · Check watermark record |
| Historical specification note · not an official maximum | 2048×2048 (native resolution watermark-free PNG direct export) | 2048x2048 (Full-resolution unwatermarked PNG deliverable) |
| 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 | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Network-observed server wait: 5.4s · End-to-end reference: 7.6s | Network-observed server wait: 4.27s · End-to-end reference: 7.61s |
| Date & fixture | 2026-10-19 · anchor_compress_v1 · US-West (California, AS2914) | 2026-11-04 · 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 | Direct anonymous usage without login or registration |
| 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. | Not verified |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | DupliChecker (duplichecker.com) | YouCompress |
| 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. | Not verified |
| 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 | Google AdSense · Google Analytics · Fathom Analytics |
| Engineering & privacy assessment | Delivers compressed outputs via temporary AWS S3 buckets (temp-ca.s3.amazonaws.com) and states that temporary files are automatically purged. | Not verified |
| 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). | |
| 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. | |
| 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. | |
| 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) | 55 / 65 Size Reduction: -65.65% (4137.9 KB → 1421.6 KB, 2.91× ratio) · PSNR: 34.97 dB · SSIM: 0.9956 |
| Deliverable specifications | 20 / 20 100% preserves 2048×2048 pixel dimensions and native PNG format without watermarks or login (20.0/20) | 20 / 20 Clean unwatermarked export (8/8); Export spec: 2048x2048 (Full-resolution unwatermarked PNG deliverable) |
| Processing speed | 11.8 / 15 Cloud upload and AWS S3 compressed delivery complete in ~7.6s (~5.4s server processing) (11.8/15) | 13.5 / 15 Network-observed server wait: 4.27s (API mode: sync_json_verified; network upload 3.34s / end-to-end 7.61s shown for reference only, never penalized) |
