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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 | imageresizer.com | Optimizilla | Switch / compare |
|---|---|---|---|
| Image compression | 91/100 2048 × 2048 · PNG | 88/100 2048 × 2048 · PNG | Active task |
| Image upscaling | 90/100 2048 × 2048 · PNG | Not tested in topic | Compare in task topic → |
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Browse this task →| Criterion | ImageResizer Image compression 91/100 Seven-aspect task score ImageResizer provides login-free cloud compression with full-resolution 2048×2048 watermark-free export, reducing file size by 78.3% (4.04MB to 899KB) in 5.99s server time; a 10MB single-file free limit and standard banner ads apply. Tested export 2048 × 2048 · PNG Historical test · 2026-11-01 | Optimizilla (ImageCompressor.com) Image compression 88/100 Seven-aspect task score Free login-free on-device processing offers color controls and about 58% PNG reduction; download-like and fullscreen ads create misclick risk. Tested export 2048 × 2048 · PNG Historical test · 2026-10-18 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | Site-wide image resizing, compression, cropping, and conversion subscriptions · 2026-11-01 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-11-01 ↗ Free Free Free 10MB file limit, up to 5 images per batch, 10 images/day across premium tools Access to basic image resizer, compressor, converter, and cropping tools；Ad-supported, 5 images per batch, 10MB per image；Free indefinitely, no renewal；Perpetual access Pro2026-11-01 ↗ USD 6.99/month — Monthly 50MB file limit, up to 20 images per batch, 100 images/day across premium tools Full access to Image Resizer tools, zero ads, priority processing；50MB per image, 20 images per batch Rules [1] [2]Ultra2026-11-01 ↗ USD 9.99/month — Monthly 1GB file limit, up to 100 images per batch, unlimited images Highest specifications across all tools, 24/7 dedicated support, zero ads；1GB per image, 100 images per batch Rules [1] [2]3 plan / billing-period records, all listed; — means that period is not recorded. Free tier covers up to 10MB/image and 5 images/batch; Pro ($6.99/mo) and Ultra ($9.99/mo) offer higher limits with no hidden fees and cancel-anytime policy. Cancellation, sources & verification recordCancellation and refund terms unverified ImageResizer Official Pricing ↗ · 2026-11-01 Capture 1 ↗ | ImageCompressor.com in-browser online image compressor · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free Browser Compressor2026-10-21 ↗ Free Free Free Free without login; local browser processing for JPEG/PNG/WebP/GIF/SVG with batch compression and per-image quality tuning. 1 plan / billing-period records, all listed; — means that period is not recorded. The official page states that this free online tool runs entirely in the browser with no server uploads required, supporting batch JPEG, PNG, WebP, GIF, and SVG compression with per-image quality tuning, supported by display ads. Cancellation, sources & verification recordAd-supported free tool with no accounts or subscription charges. ImageCompressor.com official page and instructions ↗ · 2026-10-21 Capture 1 ↗ |
| Free & trial allowance on the test date | 10MB per file limit, up to 5 images per batch, no daily hard cutoff | Supports multi-file batch drag-and-drop and per-image palette color tuning (2–256 colors) with no daily cap |
| Cancellation & refunds | Not verified | Ad-supported free tool with no accounts or subscription charges. |
| Disclosure of costs & limits | Not verified | All features and sliders are unlocked upfront with zero hidden paywalls |
| Task quality | ||
| Measured fixture results | File reduction: 78.26% · Output size: 899.4 KB | File reduction: 57.64% · Output size: 1752.7 KB |
| Fixture findings | Retained original PNG format and alpha channel, scoring 30.58 dB PSNR and 0.9879 SSIM with clean metallic texture and no artifacts. | Offers before/after preview and colour adjustment; distinguish nearby ad buttons from the real download. |
| Original historical observation | Uploaded 4.04 MB (4,137.9 KB) test image; under default smart compression, cloud processing completed in 5.99 seconds yielding 899.41 KB deliverable (78.26% reduction). Micro-details remained unblurred, with 30.58 dB PSNR and 0.9879 SSIM; provides interactive before/after slider with one-click download. | Optimizilla (imagecompressor.com) shines with its interactive Before/After comparison canvas and 'Colors: 224' fine-tuning slider, shrinking our 4.14 MB anchor by 57.64% to 1.75 MB at PSNR=38.98 dB; however, users must watch out for two green 'DOWNLOAD EXTENSION' fake download ad banners directly above and below the workspace (01_landing.png, 02_workspace.png). |
| Suitable uses · historical assessment | Not verified | Users who want to manually fine-tune PNG palette color counts (2–256 colors) with a live Before/After preview—provided they avoid the fake 'DOWNLOAD EXTENSION' ad banners |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | 2048 × 2048 · PNG · Check watermark record | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048×2048 (Zero-watermark native PNG export without login) | 2048×2048 (no-login native-resolution watermark-free PNG direct export) |
| Watermark observation | Not verified | Watermark-free |
| Batch & API | Not verified | Supports multi-image batch compression in browser; no developer API |
| 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: 5.99s · End-to-end reference: 15.36s | Recorded local processing time: 11.88s · End-to-end reference: 11.88s |
| Date & fixture | 2026-11-01 · 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 | Not verified | No login in this test |
| Sign-in methods | Available without login; supports email registration and paid subscriptions | No login required (no account system on the site) |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | While there are no sign-up walls, the workspace is flanked top and bottom by deceptive green 'DOWNLOAD EXTENSION / Click "Download" -> Add Trusted Spot Extension' ad banners, and a full-screen Google AdSense overlay (#aswift_3) intercepted the initial COMPRESS click (01_landing.png, 02_workspace.png). |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | ImageResizer.com | Optimizilla / ImageCompressor.com |
| Recorded origin | United States | Independent European Web Utility (Launched 2014) |
| Domain history record | Founded in 2012 | 2014–Present (12-year image compression benchmark) |
| Background & reputation assessment | Not verified | Operating since 2014 under the Optimizilla brand, ranking among the highest-traffic search destinations for online image compression. |
| External reputation record | Established free online image utility with over 14 years of reliable operation, trusted by developers and creators. | Not verified |
| Engineering & privacy | ||
| Processing location | Uploaded for cloud processing | On-device processing |
| Third-party tracking record | Google Analytics · Google AdSense | Not verified |
| Engineering & privacy assessment | Not verified | Modernized architecture runs 100% local in-browser WebAssembly palette quantization ('All processing happens in your browser'), so user photos are never uploaded to a remote server. |
| Retention statement | Claims deletion within 6 hours; deletion not independently verified | This flow runs locally; post-close deletion not independently verified |
| Evaluation basis | ||
| Pricing transparency | 32 / 35 100% free across the entire site with zero paywalls or subscription prompts; uploading the 4.14 MB (2048×2048) anchor image and clicking COMPRESS immediately unlocks the SAVE ALL export button without login (01_landing.png, 02_workspace.png, 03_download.png). | |
| Interaction restraint | 20 / 30 While there are no sign-up walls, the workspace is flanked top and bottom by deceptive green 'DOWNLOAD EXTENSION / Click "Download" -> Add Trusted Spot Extension' ad banners, and a full-screen Google AdSense overlay (#aswift_3) intercepted the initial COMPRESS click (01_landing.png, 02_workspace.png). | |
| Background & reputation | 18 / 20 Operating since 2014 under the Optimizilla brand, ranking among the highest-traffic search destinations for online image compression. | |
| Engineering & privacy | 14.5 / 15 Modernized architecture runs 100% local in-browser WebAssembly palette quantization ('All processing happens in your browser'), so user photos are never uploaded to a remote server. | |
| Task quality | 58 / 65 Size Reduction: -78.26% (4137.9 KB → 899.4 KB, 4.6× ratio) · PSNR: 30.58 dB · SSIM: 0.9879 | 59.5 / 65 Default 224-color PNG palette quantization shrinks the 4,137.9 KB anchor down to 1,752.7 KB (-57.64%, 2.36× ratio) at PSNR = 38.98 dB and SSIM = 0.9983, with an interactive 2–256 Colors slider and live Before/After canvas preview (59.5/65) |
| Deliverable specifications | 20 / 20 Clean unwatermarked export (8/8); Export spec: 2048×2048 (Zero-watermark native PNG export without login) | 20 / 20 Preserves 100% of the 2048×2048 pixel dimensions and native PNG format without watermarks or login requirements (20.0/20) |
| Processing speed | 12.5 / 15 Network-observed server wait: 5.99s (API mode: cloud_server; network upload 9.37s / end-to-end 15.36s shown for reference only, never penalized) | 10.5 / 15 Local browser 224-color palette quantization on the 2048×2048 PNG takes ~11.88s and requires clicking COMPRESS followed by SAVE ALL (10.5/15) |
