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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 | tools.hellokeyboard.com | Switch / compare |
|---|---|---|---|
| Image compression | 97/100 JPEG · Output attached | 92/100 JPEG · Output attached | Active task |
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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 | Hello Keyboard Tools Image compression 92/100 Seven-aspect task score Hello Keyboard Tools is a free, login-free client-side image compressor that achieves an 85.99% volume reduction (4.14 MB to 580 KB) in only 250ms at default 80% quality, reaching 42.34 dB PSNR and 0.9992 SSIM with complete local privacy and instant turnaround; as it defaults to JPEG output, users requiring transparency for PNG inputs should select the WebP format. Tested export JPEG · Output attached Historical test · 2026-11-06 |
|---|---|---|
| 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 ↗ | Hello Keyboard Tools site-wide free utilities · 2026-11-06 Plan · source date Monthly / one-time Annual bill / period Quota & limits Web Free2026-11-06 ↗ Free Free Free Free use across all utilities without registration; supports up to 20 MB per file depending on the tool 1 plan / billing-period records, all listed; — means that period is not recorded. The official site declares tools are free to use, require no login, no subscription, with files primarily processed locally in the browser. Cancellation, sources & verification recordCompletely free utility suite; no subscription or cancellation required. Hello Keyboard Tools homepage declaration and tool directory ↗ · 2026-11-06 Capture 1 ↗ Hello Keyboard Tools privacy and processing policy ↗ · 2026-11-06 Capture 1 ↗ |
| Free & trial allowance on the test date | Unlimited free forever with no daily count or file size caps | Completely free, no quota limits, pure client-side single-image processing (up to 20 MB) |
| Cancellation & refunds | Completely free open-source tool with no accounts or subscription charges. | Completely free utility suite; no subscription or cancellation required. |
| Disclosure of costs & limits | Original size, compressed size, and reduction percentage are displayed in real time on drop | Page transparently outlines format choices and quality controls |
| Task quality | ||
| Measured fixture results | File reduction: 93.26% · Output size: 278.8 KB | File reduction: 85.99% · Output size: 579.8 KB |
| Fixture findings | Local processing reduced this fixture by about 93%; results depend on the codec and settings. | Under the 2048px standard anchor, Hello Keyboard Tools exports a 2048x2048 full-resolution native JPEG at default settings, achieving 42.34 dB PSNR, 0.9992 SSIM, and 85.99% file size reduction with pure client-side Canvas offline processing in 250ms. |
| 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). | Hello Keyboard Tools uses client-side Canvas encoding to compress 4.14 MB down to 579.8 KB (-86.0%) at default 80% quality, achieving 42.34 dB PSNR and 0.9992 SSIM in only 250ms. |
| 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 needing fast local image compression without uploads, prioritizing privacy, and accepting JPEG/WebP formats |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | JPEG · Output attached · No watermark in test | JPEG · Output attached · No watermark in test |
| Historical specification note · not an official maximum | 2048×2048 (unlimited dimensions, local WebAssembly zero-watermark export) | 2048 × 2048 (preserving native dimensions) |
| Watermark observation | Watermark-free | No watermark |
| Batch & API | Focused on single-image interactive codec tuning | Interactive single-file processing, up to 20 MB per file |
| Recorded free-tier dimensions | 2048 × 2048 | 2048 × 2048 |
| Attached file dimensions | Not verified | Not verified |
| Speed & reliability | ||
| Timing observation | Recorded local processing time: 0.85s · End-to-end reference: 0.85s | Recorded local processing time: 0.25s · End-to-end reference: 0.25s |
| Date & fixture | 2026-10-18 · anchor_compress_v1 · US-West (California, AS2914) | 2026-11-06 · 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) | All features available directly without registration or login |
| 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. | Not verified |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | Google Chrome Labs | Not verified |
| Recorded origin | Mountain View, California, USA | Not verified |
| Domain history record | 2018–Present (maintained by Google Chrome DevRel) | Not verified |
| Background & reputation assessment | Created and open-sourced by the Google Chrome Web DevRel team as the reference WebAssembly image codec playground. | Not verified |
| External reputation record | Not verified | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | On-device processing |
| Third-party tracking record | Not verified | Google Analytics · Cloudflare Web Analytics |
| 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. | Not verified |
| 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). | |
| Interaction restraint | 30 / 30 Zero sign-up, zero popups, and zero ad trackers—opens directly into a millisecond-responsive split-screen comparison workspace. | |
| Background & reputation | 19.5 / 20 Created and open-sourced by the Google Chrome Web DevRel team as the reference WebAssembly image codec playground. | |
| 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. | |
| 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) | 58 / 65 Size Reduction: -85.99% (4137.9 KB → 579.8 KB, 7.14× ratio) · PSNR: 42.34 dB · SSIM: 0.9992 |
| 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) | 18 / 20 Watermarked or blocked free export (0/8); Export spec: 2048 × 2048 (preserving native dimensions) |
| 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) | 15 / 15 Network-observed server wait: 0.25s (API mode: client_side; network upload 0s / end-to-end 0.25s shown for reference only, never penalized) |
