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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 | JPEG-Optimizer | ResizePixel | Switch / compare |
|---|---|---|---|
| Image compression | 95/100 2048 × 2048 · PNG | 85/100 2048 × 2048 · PNG | Active task |
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Browse this task →| Criterion | JPEG-Optimizer (Browser-Local PNG/JPEG/GIF Compressor) Image compression 95/100 Seven-aspect task score Free login-free on-device processing supports target sizes, retaining full-size PNG with about 62% reduction in this run; display ads occupy the sidebar. Tested export 2048 × 2048 · PNG Historical test · 2026-10-19 | ResizePixel Image Compressor Image compression 85/100 Seven-aspect task score Free login-free target-size compression preserves quality and offers deletion; extension ads on the download page can be confused with the real button. Tested export 2048 × 2048 · PNG Historical test · 2026-10-18 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | JPEG-Optimizer in-browser bulk image compressor and resizer · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Completely Free Web2026-10-21 ↗ Free Free Free Completely free without login; up to 20 images at once processed locally in the browser for JPEG/PNG/GIF. 1 plan / billing-period records, all listed; — means that period is not recorded. The official page states "Completely Free. 20 images at once." and "Files are NEVER sent to the server, and all processing is handled via your own browser," supporting JPEG/PNG/GIF quality, max KB size, and max dimension settings. Cancellation, sources & verification recordCompletely free in-browser tool with no accounts or paid subscriptions. JPEG-Optimizer official page and privacy notice ↗ · 2026-10-21 Capture 1 ↗ | ResizePixel online image compressor and editor web tool · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits ResizePixel Free Web2026-10-21 ↗ Free Free Free Free without login for JPG/PNG/WEBP/GIF; supports auto compression and target KB/MB compression with unwatermarked export. 1 plan / billing-period records, all listed; — means that period is not recorded. The official tool page provides free, no-login online compression for JPG, PNG, WEBP, and GIF images (with auto optimization or target KB/MB compression), supported by display ads without a paywall. Cancellation, sources & verification recordAd-supported free tool with no accounts or subscription charges. ResizePixel official online image compressor page ↗ · 2026-10-21 Capture 1 ↗ |
| Free & trial allowance on the test date | 100% free with up to 20 images per batch and one-click ZIP download | 100% free with both Auto high-fidelity compression and exact Target KB/MB compression |
| Cancellation & refunds | Completely free in-browser tool with no accounts or paid subscriptions. | Ad-supported free tool with no accounts or subscription charges. |
| Disclosure of costs & limits | Free batch quota and browser-local privacy guarantee are disclosed upfront above the fold | 100% free throughout the entire workflow |
| Task quality | ||
| Measured fixture results | File reduction: 61.76% · Output size: 1582.4 KB | File reduction: 49.63% · Output size: 2084.2 KB |
| Fixture findings | Local processing reduced this fixture by about 62%; other formats and images need separate tests. | Reduced this fixture by about 50% with detail retained; avoid the sidebar ad resembling a download button. |
| Original historical observation | Despite its legacy 'JPEG-Optimizer' name, the tool fully supports client-side PNG, JPEG, and GIF compression. It shrinks our 4.14 MB anchor PNG by 61.76% to 1.55 MB locally in 1.4s with PSNR=39.35 dB and SSIM=0.9984 (02_workspace.png, 03_download.png). | ResizePixel delivers remarkable quality in Auto (keep the quality) mode: shrinking our 4,137.9 KB PNG by 49.63% to 2,084.2 KB in 7.6s while maintaining a near-lossless 43.94 dB PSNR and 0.9994 SSIM (02_workspace.png). Users just need to ignore the green 'DOWNLOAD EXTENSION' ad on the left and click the real 'Go to Download / Download Image' button at the bottom right (03_download.png). |
| Suitable uses · historical assessment | Privacy-conscious users who strictly prohibit cloud uploads and need fast 20-image batch PNG/JPEG compression in the browser | Users who demand near-lossless visual quality (43.94 dB PSNR) or need to shrink an image to an exact KB ceiling for government/exam portals |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | 2048 × 2048 · PNG · No watermark in test | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048×2048 (native resolution watermark-free PNG direct export) | 2048×2048 full-resolution PNG free direct export (supports exact target KB/MB compression) |
| Watermark observation | Watermark-free | Watermark-free |
| Batch & API | Supports 20-image batch local compression and ZIP archive export; no external API | Single-image precision workflow (no multi-file batch zip) |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | 2048 × 2048 · PNG | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Recorded local processing time: 1.4s · End-to-end reference: 1.4s | Network-observed server wait: 5.4s · End-to-end reference: 7.6s |
| Date & fixture | 2026-10-19 · 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 | No login required (no account system on site) | No registration or login required (no account system) |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | One-click quality slider, target max KB, and dimension controls without login; exports directly via a browser blob: URL with only standard sidebar display ads. | Both the editor and download screen display a deceptive green 'DOWNLOAD EXTENSION — 2 Easy Steps: 1. Click Download 2. Add Trusted Spot Extension' ad banner on the left sidebar (02_workspace.png, 03_download.png), whereas the real green 'Go to Download / Download Image' button sits in the bottom-right corner. |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | JPEG-Optimizer (jpeg-optimizer.com) | ResizePixel |
| Recorded origin | Independent Web Utility | Ukraine |
| Domain history record | 2010–Present (16-year established domain) | 2019–Present (dedicated lightweight online image editor) |
| Background & reputation assessment | Long-running web image optimization utility (jpeg-optimizer.com) operating since 2010, modernized with a pure client-side browser processing pipeline. | Operated by an independent Ukrainian web utility team focused on lightweight browser image tools. |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | Uploaded for cloud processing |
| Third-party tracking record | Not verified | Not verified |
| Engineering & privacy assessment | Explicitly promises and verified via network inspection: 'Privacy: Files are NEVER sent to the server, and all processing is handled via your own browser.' 100% client-side zero-upload execution. | Download page explicitly states 'The download will be valid for 30 minutes' and provides a red '❌ Delete Now' button for immediate manual server deletion (03_download.png). |
| Retention statement | This flow runs locally; post-close deletion not independently verified | Claims deletion within 30 minutes; deletion not independently verified |
| Evaluation basis | ||
| Pricing transparency | 33.5 / 35 Clearly states 'Completely Free. 20 images at once.' on the landing page (01_landing.png) with zero paywalls, zero sign-up gates, and zero hidden limits; importing our 4.14 MB anchor PNG immediately generates a free local Download link and ZIP batch archive button (02_workspace.png, 03_download.png). | 32 / 35 100% free with zero paywalls or login gates, offering both 'Auto (keep the quality)' and 'Compress file to X KB/MB' modes (01_landing.png, 02_workspace.png). |
| Interaction restraint | 27.5 / 30 One-click quality slider, target max KB, and dimension controls without login; exports directly via a browser blob: URL with only standard sidebar display ads. | 17 / 30 Both the editor and download screen display a deceptive green 'DOWNLOAD EXTENSION — 2 Easy Steps: 1. Click Download 2. Add Trusted Spot Extension' ad banner on the left sidebar (02_workspace.png, 03_download.png), whereas the real green 'Go to Download / Download Image' button sits in the bottom-right corner. |
| Background & reputation | 18 / 20 Long-running web image optimization utility (jpeg-optimizer.com) operating since 2010, modernized with a pure client-side browser processing pipeline. | 16 / 20 Operated by an independent Ukrainian web utility team focused on lightweight browser image tools. |
| Engineering & privacy | 15 / 15 Explicitly promises and verified via network inspection: 'Privacy: Files are NEVER sent to the server, and all processing is handled via your own browser.' 100% client-side zero-upload execution. | 13 / 15 Download page explicitly states 'The download will be valid for 30 minutes' and provides a red '❌ Delete Now' button for immediate manual server deletion (03_download.png). |
| Task quality | 61.2 / 65 Preserves native 2048×2048 PNG format at default 80% quality while shrinking 4,137.9 KB down to 1,582.4 KB (61.76% reduction, 2.61× ratio) with PSNR = 39.35 dB and SSIM = 0.9984 (61.2/65) | 57.2 / 65 Cuts PNG file size nearly in half (-49.63%, 1.99×) while preserving an extraordinary 43.94 dB PSNR and 0.9994 SSIM (57.2/65) |
| Deliverable specifications | 20 / 20 100% preserves 2048×2048 pixel dimensions and native PNG format without watermarks or login (20.0/20) | 19 / 20 Preserves full 2048×2048 resolution and native PNG format while supporting exact target-KB compression (19.0/20) |
| Processing speed | 13.8 / 15 100% local browser computation (0s network upload), completing 4.14 MB PNG compression in ~1.4s (13.8/15) | |
