See your options side by side
Choose one task and 2–4 tools. Compare pricing, output, test results and trust.
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 | birme.net | CompressNow | Switch / compare |
|---|---|---|---|
| Image compression | 83/100 512 × 512 · PNG | 83/100 PNG · Output attached | Active task |
| Image upscaling | 94/100 2048 × 2048 · PNG | Not tested in topic | Compare in task topic → |
Select at least 2 tools to compare
You can also filter a task page first, then compare your shortlist.
Browse this task →| Criterion | BIRME Image compression 83/100 Seven-aspect task score BIRME is a free, no-login client-side image resizer and compressor that completes 88.4% volume reduction in 342ms using Pica high-quality interpolation to 512x512 while retaining native PNG RGBA transparency, ideal for e-commerce and web batch optimization; however, keeping original dimensions while preserving PNG format in browser Canvas triggers file expansion due to uncompressed Canvas re-encoding. Tested export 512 × 512 · PNG Historical test · 2026-11-01 | CompressNow Image compression 83/100 Seven-aspect task score Free login-free on-device processing discloses format conversion upfront; size reduction is substantial, but PNG export is unavailable and transparency needs care. Tested export PNG · Output attached Historical test · 2026-10-18 |
|---|---|---|
| Pricing & rules | ||
| Pricing plans | BIRME 100% free client-side batch image processing and compression · 2026-11-01 Plan · source date Monthly / one-time Annual bill / period Quota & limits Free2026-11-01 ↗ Free Free Free Completely free without login; unlimited batch image processing constrained only by client memory Smart crop, format conversion (JPG/PNG/WebP/AVIF), quality compression, watermark, AI background removal and upscaling；Pure client-side execution; very large batches may consume significant browser memory；Permanently free, no renewal；Perpetual access 1 plan / billing-period records, all listed; — means that period is not recorded. All batch resizing, compression, AI background removal, and upscaling are 100% free with voluntary donation support and zero paid plans. Cancellation, sources & verification recordCancellation and refund terms unverified BIRME Official Studio ↗ · 2026-11-01 Capture 1 ↗ | Compressnow online in-browser image compressor · 2026-10-21 Plan · source date Monthly / one-time Annual bill / period Quota & limits Compressnow Free Web2026-10-21 ↗ Free Free Free Free without login; up to 30 MB per image and up to 30 images at a time; individual or ZIP download. 1 plan / billing-period records, all listed; — means that period is not recorded. The official page and FAQ state that compression runs in the browser (images are not stored), supporting up to 30 MB per image and up to 30 images at a time for JPG/JPEG/PNG/GIF/WebP (output as JPG or WebP), with no paid tiers. Cancellation, sources & verification recordCompletely free web tool with no accounts or subscription charges. Compressnow official tool page and FAQ ↗ · 2026-10-21 Capture 1 ↗ |
| Free & trial allowance on the test date | Completely free, no quota limits, pure client-side batch processing | 100% free, up to 30 MB per image and up to 30 images per batch |
| Cancellation & refunds | Not verified | Completely free web tool with no accounts or subscription charges. |
| Disclosure of costs & limits | Page transparently outlines all resizing and compression parameters | Discloses upfront at the top of the page that output format is JPG or WebP ('Transparent areas turn white') |
| Task quality | ||
| Measured fixture results | File reduction: 88.37% · Output size: 481.4 KB | File reduction: 85.99% · Output size: 579.8 KB |
| Fixture findings | Under the 2048px standard anchor, BIRME's default preset exports a 512x512 native PNG file achieving 27.59 dB PSNR, 0.9755 SSIM, and 88.37% size reduction with pure client-side Canvas/Pica offline processing in 342ms. | Local compression reduced this fixture by about 86%; export changes to JPG or WebP, not PNG. |
| Original historical observation | BIRME executes purely in local browser Canvas with Pica interpolation, reducing 4.14 MB to 481.4 KB (-88.4%) while preserving PNG format and transparency in 342ms. | CompressNow is a fast, 100% client-side compressor: your image never leaves your browser, and in 0.9s it shrinks our 4.24 MB benchmark PNG to 579.8 KB (-85.99%, 7.14×) at 42.34 dB PSNR (02_workspace.png). Note that it only outputs JPG or WebP (disclosed upfront), so users with transparent PNGs should select the WebP toggle. |
| Suitable uses · historical assessment | E-commerce and web operations requiring fast batch resizing and compression while preserving PNG transparency | Users who want to rapidly shrink bulky PNG screenshots or photos locally in-browser into high-quality JPG or WebP (-86% size) without uploading files to any server |
| Result & output evidence | ||
| Delivery capabilities | ||
| Recorded export specifications | 512 × 512 · PNG · No watermark in test | PNG · Output attached · No watermark in test |
| Historical specification note · not an official maximum | 512 × 512 (Default Pica high-quality scaling, preserving native PNG) | 2048×2048 full-resolution free export (outputs as JPG or WebP; does not export native PNG) |
| Watermark observation | No watermark | Watermark-free |
| Batch & API | Supports arbitrary batch processing limited only by local device memory | Supports up to 30 images (≤30 MB each) with one-click DOWNLOAD ZIP |
| Recorded free-tier dimensions | 512 × 512 | 2048 × 2048 |
| Attached file dimensions | 512 × 512 · PNG | Not verified |
| Speed & reliability | ||
| Timing observation | Recorded local processing time: 0.34s · End-to-end reference: 0.34s | Recorded local processing time: 0.9s · End-to-end reference: 0.9s |
| Date & fixture | 2026-11-01 · 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 | All features available directly without registration or login | No registration or login required (100% local tool) |
| Manual adjustment | Not verified | Not verified |
| Interaction observations | Not verified | Clean single-page workspace with a live compression level slider (default 20%) and a single display ad banner, with zero popups or registration walls (02_workspace.png, 03_download.png). |
| Background & reputation | ||
| Service lifecycle notice | Not verified | Not verified |
| Operator | BIRME Project | CompressNow |
| Recorded origin | United Kingdom | France / European Independent Developer |
| Domain history record | Founded in 2013 | 2012–Present (14-year online image compression tool) |
| Background & reputation assessment | Not verified | Classic multi-language online image weight reducer operating for over 10 years (currently V6.0). |
| External reputation record | Continuously operating for 13 years since 2013, renowned for pure client-side privacy. | Not verified |
| Engineering & privacy | ||
| Processing location | On-device processing | On-device processing |
| Third-party tracking record | Google Analytics | Not verified |
| Engineering & privacy assessment | Not verified | 100% local in-browser processing (`blob:https://compressnow.com/...`); FAQ explicitly states 'Compression runs in your browser: your images never leave your device.' |
| 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 | 31 / 35 100% free for up to 30 MB per image and 30 images at a time; transparently discloses next to the Format toggle: 'Format: JPG | WebP — Works everywhere. Transparent areas turn white.' (01_landing.png). | |
| Interaction restraint | 24 / 30 Clean single-page workspace with a live compression level slider (default 20%) and a single display ad banner, with zero popups or registration walls (02_workspace.png, 03_download.png). | |
| Background & reputation | 17 / 20 Classic multi-language online image weight reducer operating for over 10 years (currently V6.0). | |
| Engineering & privacy | 15 / 15 100% local in-browser processing (`blob:https://compressnow.com/...`); FAQ explicitly states 'Compression runs in your browser: your images never leave your device.' | |
| Task quality | 48 / 65 Size Reduction: -88.37% (4137.9 KB → 481.4 KB, 8.6× ratio) · PSNR: 27.59 dB · SSIM: 0.9755 | 52.2 / 65 Shrinks file size by 85.99% (7.14×) at 42.34 dB PSNR and 0.9992 SSIM, though output format is converted to JPG or WebP (52.2/65) |
| Deliverable specifications | 15 / 20 Clean unwatermarked export (8/8); Export spec: 512 × 512 (Default Pica high-quality scaling, preserving native PNG) | 15 / 20 Preserves full 2048×2048 dimensions and supports 30 MB files, but converts PNG inputs to JPG (or WebP) rather than native `.png` (15.0/20) |
| Processing speed | 15 / 15 Network-observed server wait: 0.34s (API mode: client_side; network upload 0s / end-to-end 0.34s shown for reference only, never penalized) | 14 / 15 100% local browser Canvas compression with 0 bytes uploaded in ~0.9s (14.0/15) |
