Squoosh (Google Chrome Labs) · Image compression
Free, open-source, login-free and ad-free on-device processing suits privacy and fine control; results depend on the chosen codec and settings.
US-West (California, AS2914)
JPEG · Output attached · Open native file ↗
Subsequent pricing and service checks are shown separately without altering historical scores.
One run does not establish all complex scenes, untested paid maxima or long-term uptime.
Plans & historical pricing
Squoosh in-browser local image compressor; open-source free · 2026-10-21
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 record
Completely free open-source tool with no accounts or subscription charges.
Squoosh official page and open-source notice ↗ · 2026-10-21 Capture 1 ↗
Pricing recorded on the test date · 2026-10-18
100% Free ($0, Apache-2.0 open-source project)
Free open-source public utility
Historical context only; not current purchase guidance.
Delivery & access
- Free delivery record
- 2048 × 2048 (original dimensions, watermark-free, no file size limit)
- Watermark
- Watermark-free
- Free allowance
- Unlimited free forever with no daily count or file size caps
- Account requirements
- 100% No Login Required (no account system, pure client-side browser utility)
- Maximum specification record
- 2048×2048 (unlimited dimensions, local WebAssembly zero-watermark export)
May include advertised capabilities; this does not establish a tested paid tier.
- Batch & API
- Focused on single-image interactive codec tuning
- Manual refinement
- Not recorded or not verified
Tested result & sample
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).
- Fixture
- anchor_compress_v1
- Recorded environment
- US-West (California, AS2914)
- Local processing record
- 0.85 s
- End-to-end reference
- 0.85 s
Network wait includes round trips, queuing and polling error, not pure inference time. Local timings depend on the device; repetition counts are not standardized in legacy records.
Experience, rules & trust
- Disclosure
- Original size, compressed size, and reduction percentage are displayed in real time on drop
- Interaction
- Zero sign-up, zero popups, and zero ad trackers—opens directly into a millisecond-responsive split-screen comparison workspace.
- Entity record
- Google Chrome Labs
- Origin
- Mountain View, California, USA
- Domain history record
- 2018–Present (maintained by Google Chrome DevRel)
- Third-party tracking record
- Not recorded or not verified
- External information
- Not recorded or not verified
- Processing
- 100% client-side WebAssembly + Web Workers local parallel encoding (supports offline PWA)
- Retention statement
- Zero cloud retention: image bytes never leave your local browser memory
A recorded statement does not verify deletion or all data-processing behavior.
Verifiable audit trail & evidence
Four SHA-256-verified stages link the benchmark fixture, same-run interface screenshots, native exported artifact and archived pricing sources.
anchor_compress_v1 · Inspect fixture & file inspector →
Captures entry rules, result view and export disclosure.
Screenshots, native output and official claims support different conclusions. Evidence grades are not product safety certifications.
Evaluation basis & full scores · Overall 96.6/100
Overall = honesty & reputation × 30% + capability × 70%. Component maxima follow this report’s rubric. List scores are rounded for display; original precision is retained here.
Scoring version 2.3.1 · Test fixture anchor_compress_v1
Honesty & reputation · 99/100 · 30%
| Criterion | Score | Rationale | 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). | Evidence A → |
| Interaction restraint | 30 / 30 | Zero sign-up, zero popups, and zero ad trackers—opens directly into a millisecond-responsive split-screen comparison workspace. | Evidence A → |
| Background & reputation | 19.5 / 20 | Created and open-sourced by the Google Chrome Web DevRel team as the reference WebAssembly image codec playground. | Evidence A → |
| 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. | Evidence A → |
Capability · 95.6/100 · 70%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| 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) | Evidence A → |
| 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) | Evidence A → |
| 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) | Evidence A → |
Legacy scores may include advertised maximum capabilities. Read tested output separately from paid capabilities. Records without matching tiers and scope are not ranked together.
Revisions & corrections
- 2026-10-18
Initial local WebAssembly zero-upload verification and PSNR/compression ratio benchmark on Mode A anchor (anchor_compress_v1).