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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 | CompressNow | 11zon | Switch / compare |
|---|---|---|---|
| Image compression | 83/100 PNG · Output attached | 81/100 2048 × 2048 · PNG | Active task |
| PDF to Word | Not tested in topic | 72/100 Legacy OLE2 .doc (25.5 KB, 0 native tables) · Historical description; output not attached | Compare in task topic → |
| PDF compression | Not tested in topic | 75/100 PDF · Output attached | Compare in task topic → |
| PDF merge & split | Not tested in topic | 95/100 PDF · Output attached | Compare in task topic → |
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Browse this task →| Criterion | CompressNow Image compression 83/100 Seven-aspect task score Free login-free on-device processing discloses format conversion upfront; size reduction is substantial, but PNG export is unavailable and transparency needs care. Tested export PNG · Output attached Historical test · 2026-10-18 | 11zon Image Compressor Image compression 81/100 Seven-aspect task score Free login-free compression runs quickly on-device, but default settings produce banding and several extension ads resemble download buttons. Tested export 2048 × 2048 · PNG Historical test · 2026-10-18 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | Compressnow online in-browser image compressor · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Compressnow Free Web2026-10-21 ↗ Free Free Free Free without login; up to 30 MB per image and up to 30 images at a time; individual or ZIP download. 1 plan / billing-period records, all listed; — means that period is not recorded. The official page and FAQ state that compression runs in the browser (images are not stored), supporting up to 30 MB per image and up to 30 images at a time for JPG/JPEG/PNG/GIF/WebP (output as JPG or WebP), with no paid tiers. Cancellation, sources & verification recordCompletely free web tool with no accounts or subscription charges. Compressnow official tool page and FAQ ↗ · 2026-10-21 Capture 1 ↗ | 11zon web PDF-to-Word free tool · 2026-10-20 Plan · source date Monthly / one-time Annual bill / period Quota & limits Web free2026-10-20 ↗ Free Free Free Free conversion; the page says multiple PDFs can be converted together. Numeric page and file-size limits are not listed. 1 plan / billing-period records, all listed; — means that period is not recorded. The official tool page states free, unlimited conversion. Numeric size and page limits are not published; the claim is not a guarantee for arbitrary files. Cancellation, sources & verification recordCancellation and refund terms follow official checkout and help policies. Official feature and pricing page ↗ · 2026-10-20 Capture 1 ↗ |
| Free & trial allowance on the test date | 100% free, up to 30 MB per image and up to 30 images per batch | Free batch compression with both percentage Slider and target-KB Size tabs and no daily cap |
| Cancellation & refunds | Completely free web tool with no accounts or subscription charges. | Cancellation and refund terms follow official checkout and help policies. |
| Disclosure of costs & limits | Discloses upfront at the top of the page that output format is JPG or WebP ('Transparent areas turn white') | Automatically compresses at the default 60% level upon upload and displays 'New size: 842 KB' |
| Task quality | ||
| Measured fixture results | File reduction: 85.99% · Output size: 579.8 KB | File reduction: 79.65% · Output size: 842 KB |
| Fixture findings | Local compression reduced this fixture by about 86%; export changes to JPG or WebP, not PNG. | Strong size reduction suits upload limits; gradients show banding and download ads need care. |
| Original historical observation | CompressNow is a fast, 100% client-side compressor: your image never leaves your browser, and in 0.9s it shrinks our 4.24 MB benchmark PNG to 579.8 KB (-85.99%, 7.14×) at 42.34 dB PSNR (02_workspace.png). Note that it only outputs JPG or WebP (disclosed upfront), so users with transparent PNGs should select the WebP toggle. | 11zon offers a very handy dual-tab interface ('Slider' by % and 'Size' by target KB), shrinking our 4.14 MB PNG down to 842 KB (-79.65%) in 1.8s at its default 60% level; however, the aggressive palette cut causes visible gradient banding (PSNR=32.83 dB) and users must dodge 3 green 'DOWNLOAD EXTENSION' fake ad buttons (02_workspace.png). |
| Suitable uses · historical assessment | Users who want to rapidly shrink bulky PNG screenshots or photos locally in-browser into high-quality JPG or WebP (-86% size) without uploading files to any server | Users facing strict government or academic portal upload limits (e.g., forcing a large PNG under 1 MB or an exact KB target) who can tolerate mild background gradient banding |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | PNG · Output attached · No watermark in test | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048×2048 full-resolution free export (outputs as JPG or WebP; does not export native PNG) | 2048×2048 (no-login native-resolution watermark-free PNG, supports % Slider and target-KB modes) |
| Watermark observation | Watermark-free | Watermark-free |
| Batch & API | Supports up to 30 images (≤30 MB each) with one-click DOWNLOAD ZIP | Supports batch drag-and-drop and one-click Download ZIP; no public API |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | Not verified | 2048 × 2048 · PNG |
| Speed & reliability | ||
| Timing observation | Recorded local processing time: 0.9s · End-to-end reference: 0.9s | Recorded local processing time: 1.8s · End-to-end reference: 1.8s |
| Date & fixture | 2026-10-18 · 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 registration or login required (100% local tool) | No login required; optional account sign-in in the top header |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Clean single-page workspace with a live compression level slider (default 20%) and a single display ad banner, with zero popups or registration walls (02_workspace.png, 03_download.png). | While the tool itself has no paywall, the workspace is surrounded by 3 green 'DOWNLOAD EXTENSION (2 Easy Steps: 1. Click "Download" 2. Add Trusted Spot Extension)' fake download ad buttons at the top, right sidebar, and sticky bottom bar (02_workspace.png). |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | CompressNow | 11zon.com |
| Recorded origin | France / European Independent Developer | India / Global multilingual utility network |
| Domain history record | 2012–Present (14-year online image compression tool) | 2021–Present |
| Background & reputation assessment | Classic multi-language online image weight reducer operating for over 10 years (currently V6.0). | Fast-growing multilingual utility network covering PDF and image processing sub-sites. |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | On-device processing |
| Third-party tracking record | Not verified | Not verified |
| Engineering & privacy assessment | 100% local in-browser processing (`blob:https://compressnow.com/...`); FAQ explicitly states 'Compression runs in your browser: your images never leave your device.' | Underlying Blob URL inspection confirms that 11zon compresses images locally inside browser memory (~1.8s) without uploading original photos to a remote server. |
| Retention statement | This flow runs locally; post-close deletion not independently verified | This flow runs locally; post-close deletion not independently verified |
| Evaluation basis | ||
| Pricing transparency | 31 / 35 100% free for up to 30 MB per image and 30 images at a time; transparently discloses next to the Format toggle: 'Format: JPG | WebP — Works everywhere. Transparent areas turn white.' (01_landing.png). | 31.5 / 35 100% free without login: uploading the 4.14 MB (2048×2048) anchor image immediately unlocks individual Download and batch Download ZIP buttons with zero paywalls or watermarks (01_landing.png, 02_workspace.png, 03_download.png). |
| Interaction restraint | 24 / 30 Clean single-page workspace with a live compression level slider (default 20%) and a single display ad banner, with zero popups or registration walls (02_workspace.png, 03_download.png). | 17.5 / 30 While the tool itself has no paywall, the workspace is surrounded by 3 green 'DOWNLOAD EXTENSION (2 Easy Steps: 1. Click "Download" 2. Add Trusted Spot Extension)' fake download ad buttons at the top, right sidebar, and sticky bottom bar (02_workspace.png). |
| Background & reputation | 17 / 20 Classic multi-language online image weight reducer operating for over 10 years (currently V6.0). | 16.5 / 20 Fast-growing multilingual utility network covering PDF and image processing sub-sites. |
| Engineering & privacy | 15 / 15 100% local in-browser processing (`blob:https://compressnow.com/...`); FAQ explicitly states 'Compression runs in your browser: your images never leave your device.' | 14.5 / 15 Underlying Blob URL inspection confirms that 11zon compresses images locally inside browser memory (~1.8s) without uploading original photos to a remote server. |
| Task quality | 52.2 / 65 Shrinks file size by 85.99% (7.14×) at 42.34 dB PSNR and 0.9992 SSIM, though output format is converted to JPG or WebP (52.2/65) | 48 / 65 Defaults its 'Compression Level' slider to an aggressive 60%, slashing the 4,137.9 KB PNG down to 842.0 KB (-79.65%, 4.91× ratio) and offering a 'Size' tab for target-KB compression; however, aggressive palette reduction lowers PSNR to 32.83 dB (SSIM = 0.9928) with visible contour banding across the background wall gradient (48.0/65) |
| Deliverable specifications | 15 / 20 Preserves full 2048×2048 dimensions and supports 30 MB files, but converts PNG inputs to JPG (or WebP) rather than native `.png` (15.0/20) | 19.5 / 20 Preserves 2048×2048 native resolution and PNG format without login or watermarks, supporting both single-file and ZIP exports (19.5/20) |
| Processing speed | 14 / 15 100% local browser Canvas compression with 0 bytes uploaded in ~0.9s (14.0/15) | 14.5 / 15 Local in-browser quantization completes in ~1.8s after file selection (14.5/15) |
