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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 | quickimagekit.com | Compressor.io | Switch / compare |
|---|---|---|---|
| Image compression | 92/100 WEBP · Output attached | 86/100 2048 × 2048 · PNG | Active task |
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Browse this task →| Criterion | QuickImageKit Image Compressor Image compression 92/100 Seven-aspect task score 100% free and local in-browser compression with zero cloud upload, shrinking our 4.14 MB anchor by 93.33% to 276 KB (37.75 dB PSNR) in 0.54s, though PNG inputs are converted to WebP as disclosed. Tested export WEBP · Output attached Historical test · 2026-10-26 | Compressor.io Image compression 86/100 Seven-aspect task score Free size and Pro feature limits are disclosed upfront; login-free export retains full-size PNG with good quality, alongside banner ads. Tested export 2048 × 2048 · PNG Historical test · 2026-10-18 |
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| Pricing & rules | ||
| Pricing plans | Quick Image Kit in-browser local image utilities; completely free · 2026-10-26 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free local web tool2026-10-26 ↗ Free Free Free Completely free without login; 100% local in-browser processing with quality slider and 50KB/100KB/200KB/500KB target-size presets, watermark-free export. PNG inputs are converted to WebP upon export (disclosed upfront as Format: PNG → WebP) 1 plan / billing-period records, all listed; — means that period is not recorded. The official page states that images are decoded and rendered locally in the browser without server uploads, with no paid subscriptions or credit packs; PNG inputs are exported as WebP. Cancellation, sources & verification recordCompletely free local utility with no accounts or paid subscriptions. Quick Image Kit official image compressor and privacy notice page ↗ · 2026-10-26 Capture 1 ↗ · Capture 2 ↗ | Compressor.io web plans (Free / Web Compressor Pro); USD · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-10-21 ↗ Free Free Free Free without login; max 10 MB per file, up to 50 compressions/day (supports JPEG/PNG/SVG/GIF/WEBP lossy and lossless modes). Web Compressor Pro2026-10-21 ↗ — USD 50/year Annual USD 50/year (1 user); max 20 MB per file, unlimited compressions, custom compression quality, image resizing, auto-rename, and no ads. Annual subscription; cancel anytime in the Account dashboard 2 plan / billing-period records, all listed; — means that period is not recorded. The official pricing page currently offers Free (max 10 MB per file, up to 50 lossy/lossless compressions per day) and Web Compressor Pro annual subscription (USD 50/year, max 20 MB per file, unlimited compressions, custom quality, image resizing, auto-rename, and no ads). Cancellation, sources & verification recordCancel anytime in the Account dashboard; official FAQ states a 7-day full refund with no questions asked (credit card refunds take 3–5 working days). Compressor.io official pricing and features comparison page ↗ · 2026-10-21 Capture 1 ↗ |
| Free & trial allowance on the test date | Unlimited free usage with multi-image drag-and-drop and ZIP batch download | Free up to 10 MB per file with both Lossy and Lossless modes; Custom quality and image resizing require Pro |
| Cancellation & refunds | Completely free local utility with no accounts or paid subscriptions. | Cancel anytime in the Account dashboard; official FAQ states a 7-day full refund with no questions asked (credit card refunds take 3–5 working days). |
| Disclosure of costs & limits | Upfront disclosure on both landing page and workspace that PNG inputs convert to WebP | Discloses 'Max 10 MB' directly above the Select files button |
| Task quality | ||
| Measured fixture results | File reduction: 93.33% · Output size: 276 KB | File reduction: 47.38% · Output size: 2177.3 KB |
| Fixture findings | Default Balanced mode converts the 4,137.9 KB anchor to a 276.0 KB WebP (-93.33%) with 37.75 dB PSNR and 0.9977 SSIM, keeping text and edges crisp. | Reduced this fixture by about 47% with gradients retained; the recorded free file limit was 10MB. |
| Original historical observation | Running 100% locally in the browser (0.0s upload, 0.54s end-to-end), QuickImageKit compressed our 4,137.9 KB (2048×2048) anchor PNG into a 276.0 KB WebP (-93.33%) at 37.75 dB PSNR and 0.9977 SSIM with sharp text and edges (02_workspace.png, 03_download.png). | Compressor.io adopts a conservative high-fidelity strategy in default Lossy mode: compressing our 4,137.9 KB master to 2,177.3 KB (-47.38%, 02_workspace.png) while maintaining 38.39 dB PSNR and 0.9980 SSIM with smooth dark gradients and clear upfront 10 MB limit disclosure. |
| Suitable uses · historical assessment | Privacy-conscious web developers and creators who want zero cloud upload and >90% size reduction into modern WebP format | Web designers compressing images under 10 MB who want high visual fidelity (PSNR > 38 dB) and easy switching between Lossy and Lossless modes |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | WEBP · Output attached · No watermark in test | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048 × 2048 (Full-size watermark-free WebP) | 2048×2048 full-resolution PNG free direct export (up to 10 MB per file) |
| Watermark observation | Watermark-free | Watermark-free |
| Batch & API | Supports multi-image drag-and-drop and batch ZIP download; no external REST API | Supports multi-file drag-and-drop 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: 0s · End-to-end reference: 0.54s | Network-observed server wait: 8.4s · End-to-end reference: 10.5s |
| Date & fixture | 2026-10-26 · anchor_compress_v1 · US-West (California, AS2914) | 2026-10-18 · 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 | 100% login-free (no account system; pure local browser utility) | No login required (email login for Pro subscribers) |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Zero registration prompts, ad overlays, or deceptive redirects; dropping an image immediately displays original size, compressed size, reduction percentage, and a direct download button. | Displays Google AdSense banners above and below the workspace, but the orange 'Download' and 'Download All' buttons are clean and direct without registration popups (02_workspace.png, 03_download.png). |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | QuickImageKit (Independent Client-Side Toolkit) | Compressor.io |
| Recorded origin | Undisclosed jurisdiction (Cloudflare global edge) | France / European Independent Tool Team |
| Domain history record | 2026–Present | 2013–Present (13-year established image optimizer) |
| Background & reputation assessment | Independent client-side browser image toolkit launched in 2026 with clear privacy documentation and contact channels, though without a disclosed corporate entity name. | Well-known online image optimization service operating since 2013 with strong adoption among web designers and developers. |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | Uploaded for cloud processing |
| Third-party tracking record | Vercel Web Analytics (_vercel/insights) | Not verified |
| Engineering & privacy assessment | Verified via browser network monitoring: image compression runs 100% locally via Canvas / WebP encoding with zero bytes uploaded to any remote server (upload_s_net = 0s). | Supports anonymous no-login compression; temporary download links are cleaned up automatically after the session. |
| Retention statement | This flow runs locally; post-close deletion not independently verified | Explicit retention period unconfirmed; inspect policy record |
| Evaluation basis | ||
| Pricing transparency | 35 / 35 100% free with no account registration, paywalls, or file-count caps; the landing page and workspace clearly disclose upfront that PNG inputs are converted to WebP for maximum compression (Format: PNG → WebP). Dropping our 4,137.9 KB (2048×2048) anchor PNG immediately enabled a free 276.0 KB download (01_landing.png, 02_workspace.png, 03_download.png). | 31 / 35 Clearly states 'compress jpg, png, gif, svg, webp. Max 10 MB.' inside the upload zone (01_landing.png); advanced custom resize and rename options are clearly badged 'PRO ONLY' upfront with zero post-upload paywall. |
| Interaction restraint | 29 / 30 Zero registration prompts, ad overlays, or deceptive redirects; dropping an image immediately displays original size, compressed size, reduction percentage, and a direct download button. | 25 / 30 Displays Google AdSense banners above and below the workspace, but the orange 'Download' and 'Download All' buttons are clean and direct without registration popups (02_workspace.png, 03_download.png). |
| Background & reputation | 14.5 / 20 Independent client-side browser image toolkit launched in 2026 with clear privacy documentation and contact channels, though without a disclosed corporate entity name. | 18 / 20 Well-known online image optimization service operating since 2013 with strong adoption among web designers and developers. |
| Engineering & privacy | 14.5 / 15 Verified via browser network monitoring: image compression runs 100% locally via Canvas / WebP encoding with zero bytes uploaded to any remote server (upload_s_net = 0s). | 14 / 15 Supports anonymous no-login compression; temporary download links are cleaned up automatically after the session. |
| Task quality | 59.5 / 65 In default Balanced mode, compresses the 4,137.9 KB (2048×2048) PNG anchor to a 276.0 KB WebP (-93.33%, 14.99× ratio) while achieving PSNR = 37.75 dB and SSIM = 0.9977 (59.5/65) | 55.5 / 65 Reduces file size by 47.38% (1.90×) while achieving 38.39 dB PSNR and 0.9980 SSIM with high visual fidelity (55.5/65) |
| Deliverable specifications | 17 / 20 Preserves 100% of the 2048×2048 pixel resolution with zero watermarks or login walls and supports multi-file ZIP export; 3 points deducted because PNG inputs are converted to WebP (explicitly disclosed as Format: PNG → WebP) rather than preserving a native PNG container (17.0/20) | 18.5 / 20 Preserves full 2048×2048 resolution and native PNG format with one-click no-login download (18.5/20) |
| Processing speed | 15 / 15 100% client-side local browser encoding with 0.0s network upload or server wait, completing the 2048×2048 anchor in ~0.54s end-to-end (15.0/15) | 11.5 / 15 Total cloud upload and optimization time ~10.5s (~8.4s pure server processing) (11.5/15) |
