JPEG-Optimizer (Browser-Local PNG/JPEG/GIF Compressor) · Image compression
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.
US-West (California, AS2914)
2048 × 2048 · PNG · 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
JPEG-Optimizer in-browser bulk image compressor and resizer · 2026-10-21
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 record
Completely free in-browser tool with no accounts or paid subscriptions.
JPEG-Optimizer official page and privacy notice ↗ · 2026-10-21 Capture 1 ↗
Pricing recorded on the test date · 2026-10-19
$0 (100% Free with no paid tiers)
Completely free (supported by display ads)
Historical context only; not current purchase guidance.
Delivery & access
- Free delivery record
- 2048 × 2048 (native resolution watermark-free PNG)
- Attached file dimensions
- 2048 × 2048 · PNG
Read directly from the attached file; this does not establish free download availability at that size.
- Watermark
- Watermark-free
- Free allowance
- 100% free with up to 20 images per batch and one-click ZIP download
- Account requirements
- No login required (no account system on site)
- Maximum specification record
- 2048×2048 (native resolution watermark-free PNG direct export)
May include advertised capabilities; this does not establish a tested paid tier.
- Batch & API
- Supports 20-image batch local compression and ZIP archive export; no external API
- Manual refinement
- Not recorded or not verified
Tested result & sample
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).
- Fixture
- anchor_compress_v1
- Recorded environment
- US-West (California, AS2914)
- Local processing record
- 1.4 s
- End-to-end reference
- 1.4 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
- Free batch quota and browser-local privacy guarantee are disclosed upfront above the fold
- Interaction
- 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.
- Entity record
- JPEG-Optimizer (jpeg-optimizer.com)
- Origin
- Independent Web Utility
- Domain history record
- 2010–Present (16-year established domain)
- Third-party tracking record
- Not recorded or not verified
- External information
- Not recorded or not verified
- Processing
- 100% client-side HTML5 Canvas / WebAssembly encoding pipeline (zero server upload)
- Retention statement
- Files never leave the user's browser memory and are cleared immediately when the tab closes
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.
JPEG-Optimizer official page and privacy notice (snapshot ↗)
Screenshots, native output and official claims support different conclusions. Evidence grades are not product safety certifications.
Evaluation basis & full scores · Overall 94.7/100
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 · 94/100 · 30%
| Criterion | Score | Rationale | 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). | Evidence A → |
| 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. | Evidence A → |
| 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. | Evidence A → |
| 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. | Evidence A → |
Capability · 95/100 · 70%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| 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) | Evidence A → |
| Deliverable specifications | 20 / 20 | 100% preserves 2048×2048 pixel dimensions and native PNG format without watermarks or login (20.0/20) | Evidence A → |
| Processing speed | 13.8 / 15 | 100% local browser computation (0s network upload), completing 4.14 MB PNG compression in ~1.4s (13.8/15) | 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
- 2026-10-19
Initial browser-local compression benchmark and PSNR/SSIM verification on anchor_compress_v1.