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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 | tools.hellokeyboard.com | DupliChecker | Switch / compare |
|---|---|---|---|
| Image compression | 92/100 JPEG · Output attached | 90/100 2048 × 2048 · PNG | Active task |
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Browse this task →| Criterion | Hello Keyboard Tools Image compression 92/100 Seven-aspect task score Hello Keyboard Tools is a free, login-free client-side image compressor that achieves an 85.99% volume reduction (4.14 MB to 580 KB) in only 250ms at default 80% quality, reaching 42.34 dB PSNR and 0.9992 SSIM with complete local privacy and instant turnaround; as it defaults to JPEG output, users requiring transparency for PNG inputs should select the WebP format. Tested export JPEG · Output attached Historical test · 2026-11-06 | 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 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | Hello Keyboard Tools site-wide free utilities · 2026-11-06 Plan · source date Monthly / one-time Annual bill / period Quota & limits Web Free2026-11-06 ↗ Free Free Free Free use across all utilities without registration; supports up to 20 MB per file depending on the tool 1 plan / billing-period records, all listed; — means that period is not recorded. The official site declares tools are free to use, require no login, no subscription, with files primarily processed locally in the browser. Cancellation, sources & verification recordCompletely free utility suite; no subscription or cancellation required. Hello Keyboard Tools homepage declaration and tool directory ↗ · 2026-11-06 Capture 1 ↗ Hello Keyboard Tools privacy and processing policy ↗ · 2026-11-06 Capture 1 ↗ | 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 ↗ |
| Free & trial allowance on the test date | Completely free, no quota limits, pure client-side single-image processing (up to 20 MB) | Free guests can upload up to 10 images per batch, max 5 MB per image |
| Cancellation & refunds | Completely free utility suite; no subscription or cancellation required. | The Image Compressor tool is free to use and involves no subscription charges. |
| Disclosure of costs & limits | Page transparently outlines format choices and quality controls | 'Upload Up to 10 images, max 5MB each' is printed directly inside the upload box |
| Task quality | ||
| Measured fixture results | File reduction: 85.99% · Output size: 579.8 KB | File reduction: 53.34% · Output size: 1930.7 KB |
| Fixture findings | Under the 2048px standard anchor, Hello Keyboard Tools exports a 2048x2048 full-resolution native JPEG at default settings, achieving 42.34 dB PSNR, 0.9992 SSIM, and 85.99% file size reduction with pure client-side Canvas offline processing in 250ms. | Reduced this fixture by about 53% without login or a watermark; the page contains many surrounding links. |
| Original historical observation | Hello Keyboard Tools uses client-side Canvas encoding to compress 4.14 MB down to 579.8 KB (-86.0%) at default 80% quality, achieving 42.34 dB PSNR and 0.9992 SSIM in only 250ms. | 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). |
| Suitable uses · historical assessment | Users needing fast local image compression without uploads, prioritizing privacy, and accepting JPEG/WebP formats | Users who want quick no-login compression for PNG/JPEG files under 5 MB with manual quality slider control |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | JPEG · Output attached · No watermark in test | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048 × 2048 (preserving native dimensions) | 2048×2048 (native resolution watermark-free PNG direct export) |
| Watermark observation | No watermark | Watermark-free |
| Batch & API | Interactive single-file processing, up to 20 MB per file | Supports 10-image batch upload and one-click Download All |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | Not verified | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Recorded local processing time: 0.25s · End-to-end reference: 0.25s | Network-observed server wait: 5.4s · End-to-end reference: 7.6s |
| Date & fixture | 2026-11-06 · 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 | No login in this test |
| Sign-in methods | All features available directly without registration or login | No login required |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | 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 | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Not verified | DupliChecker (duplichecker.com) |
| Recorded origin | Not verified | Multi-Tool Web Portal |
| Domain history record | Not verified | 2006–Present (20-year utility portal) |
| Background & reputation assessment | Not verified | Long-standing SEO and text/image utility portal (duplichecker.com) operating since 2006. |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | Uploaded for cloud processing |
| Third-party tracking record | Google Analytics · Cloudflare Web Analytics | Not verified |
| Engineering & privacy assessment | Not verified | Delivers compressed outputs via temporary AWS S3 buckets (temp-ca.s3.amazonaws.com) and states that temporary files are automatically purged. |
| Retention statement | This flow runs locally; post-close deletion not independently verified | 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 | 58 / 65 Size Reduction: -85.99% (4137.9 KB → 579.8 KB, 7.14× ratio) · PSNR: 42.34 dB · SSIM: 0.9992 | 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) |
| Deliverable specifications | 18 / 20 Watermarked or blocked free export (0/8); Export spec: 2048 × 2048 (preserving native dimensions) | 20 / 20 100% preserves 2048×2048 pixel dimensions and native PNG format without watermarks or login (20.0/20) |
| Processing speed | 15 / 15 Network-observed server wait: 0.25s (API mode: client_side; network upload 0s / end-to-end 0.25s shown for reference only, never penalized) | 11.8 / 15 Cloud upload and AWS S3 compressed delivery complete in ~7.6s (~5.4s server processing) (11.8/15) |
