Compressor.io · Image compression
Free size and Pro feature limits are disclosed upfront; login-free export retains full-size PNG with good quality, alongside banner ads.
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
Compressor.io web plans (Free / Web Compressor Pro); USD · 2026-10-21
Annual subscription; cancel anytime in the Account dashboard
2 plan / billing-period records, all listed; — means that period is not recorded.
The official pricing page currently offers Free (max 10 MB per file, up to 50 lossy/lossless compressions per day) and Web Compressor Pro annual subscription (USD 50/year, max 20 MB per file, unlimited compressions, custom quality, image resizing, auto-rename, and no ads).
Cancellation, sources & verification record
Cancel anytime in the Account dashboard; official FAQ states a 7-day full refund with no questions asked (credit card refunds take 3–5 working days).
Compressor.io official pricing and features comparison page ↗ · 2026-10-21 Capture 1 ↗
Pricing recorded on the test date · 2026-10-18
Pro plan $50 / year (or $9.99 / month)
Free up to 10 MB + annual/monthly Pro subscription
Historical context only; not current purchase guidance.
Delivery & access
- Free delivery record
- 2048 × 2048 full-resolution PNG (2,177.3 KB)
- 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
- Free up to 10 MB per file with both Lossy and Lossless modes; Custom quality and image resizing require Pro
- Account requirements
- No login required (email login for Pro subscribers)
- Maximum specification record
- 2048×2048 full-resolution PNG free direct export (up to 10 MB per file)
May include advertised capabilities; this does not establish a tested paid tier.
- Batch & API
- Supports multi-file drag-and-drop and one-click Download All
- Manual refinement
- Not recorded or not verified
Tested result & sample
Compressor.io adopts a conservative high-fidelity strategy in default Lossy mode: compressing our 4,137.9 KB master to 2,177.3 KB (-47.38%, 02_workspace.png) while maintaining 38.39 dB PSNR and 0.9980 SSIM with smooth dark gradients and clear upfront 10 MB limit disclosure.
- Fixture
- anchor_compress_v1
- Recorded environment
- US-West (California, AS2914)
- Network-observed server wait
- 8.4 s
- End-to-end reference
- 10.5 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
- Discloses 'Max 10 MB' directly above the Select files button
- Interaction
- Displays Google AdSense banners above and below the workspace, but the orange 'Download' and 'Download All' buttons are clean and direct without registration popups (02_workspace.png, 03_download.png).
- Entity record
- Compressor.io
- Origin
- France / European Independent Tool Team
- Domain history record
- 2013–Present (13-year established image optimizer)
- Third-party tracking record
- Not recorded or not verified
- External information
- Not recorded or not verified
- Processing
- Cloud image optimization engine (supporting both Lossy and Lossless modes)
- Retention statement
- Temporary processing queue is automatically purged after session
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.
Compressor.io official pricing and features comparison page (snapshot ↗)
Screenshots, native output and official claims support different conclusions. Evidence grades are not product safety certifications.
Evaluation basis & full scores · Overall 86.3/100
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 · 88/100 · 30%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Pricing transparency | 31 / 35 | Clearly states 'compress jpg, png, gif, svg, webp. Max 10 MB.' inside the upload zone (01_landing.png); advanced custom resize and rename options are clearly badged 'PRO ONLY' upfront with zero post-upload paywall. | Evidence A → |
| Interaction restraint | 25 / 30 | Displays Google AdSense banners above and below the workspace, but the orange 'Download' and 'Download All' buttons are clean and direct without registration popups (02_workspace.png, 03_download.png). | Evidence A → |
| Background & reputation | 18 / 20 | Well-known online image optimization service operating since 2013 with strong adoption among web designers and developers. | Evidence A → |
| Engineering & privacy | 14 / 15 | Supports anonymous no-login compression; temporary download links are cleaned up automatically after the session. | Evidence A → |
Capability · 85.5/100 · 70%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Task quality | 55.5 / 65 | Reduces file size by 47.38% (1.90×) while achieving 38.39 dB PSNR and 0.9980 SSIM with high visual fidelity (55.5/65) | Evidence A → |
| Deliverable specifications | 18.5 / 20 | Preserves full 2048×2048 resolution and native PNG format with one-click no-login download (18.5/20) | Evidence A → |
| Processing speed | 11.5 / 15 | Total cloud upload and optimization time ~10.5s (~8.4s pure server processing) (11.5/15) | 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 real-machine benchmark and PSNR/SSIM/ratio verification on Mode A compression anchor (anchor_compress_v1).