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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 | Squoosh | 11zon | Switch / compare |
|---|---|---|---|
| Image compression | 97/100 JPEG · 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 | Squoosh (Google Chrome Labs) Image compression 97/100 Seven-aspect task score Free, open-source, login-free and ad-free on-device processing suits privacy and fine control; results depend on the chosen codec and settings. Tested export JPEG · 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 | Squoosh in-browser local image compressor; open-source free · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Squoosh Web (Open-source free)2026-10-21 ↗ Free Free Free Completely free without login; local browser processing with no usage-count or file-size hard caps and full-resolution unwatermarked export. 1 plan / billing-period records, all listed; — means that period is not recorded. The official page states that all work runs locally in the browser so images never leave the device; it is an Apache-2.0 open-source tool with no paid tiers or in-app purchases. Cancellation, sources & verification recordCompletely free open-source tool with no accounts or subscription charges. Squoosh official page and open-source notice ↗ · 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 | Unlimited free forever with no daily count or file size caps | Free batch compression with both percentage Slider and target-KB Size tabs and no daily cap |
| Cancellation & refunds | Completely free open-source tool with no accounts or subscription charges. | Cancellation and refund terms follow official checkout and help policies. |
| Disclosure of costs & limits | Original size, compressed size, and reduction percentage are displayed in real time on drop | Automatically compresses at the default 60% level upon upload and displays 'New size: 842 KB' |
| Task quality | ||
| Measured fixture results | File reduction: 93.26% · Output size: 278.8 KB | File reduction: 79.65% · Output size: 842 KB |
| Fixture findings | Local processing reduced this fixture by about 93%; results depend on the codec and settings. | Strong size reduction suits upload limits; gradients show banding and download ads need care. |
| Original historical observation | Squoosh is the gold standard of honest online utilities: uploading 0 bytes to any server, its local WebAssembly engine compresses our 4.24 MB 2048×2048 anchor image down to 278.8 KB (-93.26%) in 0.85s while maintaining PSNR=37.13 dB and SSIM=0.9973 (02_workspace.png). | 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 | Privacy-conscious users, developers, and designers who refuse to upload sensitive photos to cloud servers and want fine-grained codec control with real-time split-screen preview | 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 | JPEG · Output attached · No watermark in test | 2048 × 2048 · PNG · No watermark in test |
| Historical specification note · not an official maximum | 2048×2048 (unlimited dimensions, local WebAssembly zero-watermark export) | 2048×2048 (no-login native-resolution watermark-free PNG, supports % Slider and target-KB modes) |
| Watermark observation | Watermark-free | Watermark-free |
| Batch & API | Focused on single-image interactive codec tuning | 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: 0.85s · End-to-end reference: 0.85s | 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 | 100% No Login Required (no account system, pure client-side browser utility) | No login required; optional account sign-in in the top header |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Zero sign-up, zero popups, and zero ad trackers—opens directly into a millisecond-responsive split-screen comparison workspace. | 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 | Google Chrome Labs | 11zon.com |
| Recorded origin | Mountain View, California, USA | India / Global multilingual utility network |
| Domain history record | 2018–Present (maintained by Google Chrome DevRel) | 2021–Present |
| Background & reputation assessment | Created and open-sourced by the Google Chrome Web DevRel team as the reference WebAssembly image codec playground. | 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 | CDP network capture confirms 100% client-side WebAssembly execution (MozJPEG / OxiPNG / WebP / AVIF) with 0 bytes uploaded to any remote server; works offline as a PWA. | 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 | 35 / 35 100% open-source and free with zero paywalls, zero in-app purchases, zero resolution caps, and zero ads. Dragging in the 4.24 MB (2048×2048) anchor image immediately enables real-time split-slider comparison and one-click export (01_landing.png, 02_workspace.png, 03_download.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 | 30 / 30 Zero sign-up, zero popups, and zero ad trackers—opens directly into a millisecond-responsive split-screen comparison workspace. | 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 | 19.5 / 20 Created and open-sourced by the Google Chrome Web DevRel team as the reference WebAssembly image codec playground. | 16.5 / 20 Fast-growing multilingual utility network covering PDF and image processing sub-sites. |
| Engineering & privacy | 14.5 / 15 CDP network capture confirms 100% client-side WebAssembly execution (MozJPEG / OxiPNG / WebP / AVIF) with 0 bytes uploaded to any remote server; works offline as a PWA. | 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 | 61.6 / 65 Reduces file size by 93.26% (4,137.9 KB → 278.8 KB, 14.84× compression ratio) while preserving PSNR = 37.13 dB and SSIM = 0.9973, with full control over OxiPNG, MozJPEG, WebP, and AVIF encoders (61.6/65) | 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 | 20 / 20 Preserves exact 2048×2048 dimensions (unless Resize is toggled by the user) with unrestricted local PNG/JPEG/WebP/AVIF download (20.0/20) | 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 multi-threaded WebAssembly encoding with 0.0s network upload latency; re-encodes the 2048×2048 anchor in ~0.85s (14.0/15) | 14.5 / 15 Local in-browser quantization completes in ~1.8s after file selection (14.5/15) |
