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Every image tool you need, 100% free and private — convert, compress, crop, resize, upscale, remove backgrounds, and add watermarks, directly in your browser.

Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.

Which is more popular?
Based on our record, Cert Decoder seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | pixeltools.io | certdecoder.com |
| Pricing | ||
| Platforms | ||
| Company | 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


PixelTools is a free, privacy-first toolkit for everyday image tasks. It bundles eight tools in one place: an image compressor (reduce file size up to 90%), a format converter (WebP, HEIC, PNG, JPG, AVIF, SVG, BMP, TIFF), a resizer with one-click social presets (Instagram, Pinterest, YouTube,...
Cert Decoder is a free online tool that helps you decode X.509 SSL/TLS certificates in PEM format. It instantly shows important information like the issuer, expiry date, SAN entries, and fingerprint. All data is processed locally in your browser, so nothing is ever sent or stored elsewhere.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing PixelTools.io and Cert Decoder.
PixelTools.io's answer
PixelTools started from frustration with existing image tools — they upload your files, hide features behind paywalls, add watermarks to exports, or force an account for simple tasks. The goal was a single, fast, privacy-first toolkit that does everything in the browser, for free. Thanks to modern browser APIs and WebAssembly, all processing happens on-device, so your images never leave your computer.
Cert Decoder's answer:
I built certdecoder.com over the weekend for my own needs. Sometimes in my work, I need to verify and check certificate details.
PixelTools.io's answer
PixelTools is built with Next.js (App Router) and React with TypeScript. All image processing runs client-side via the browser's Canvas API and WebAssembly (e.g. for HEIC decoding), with on-device machine-learning models powering the AI background removal and upscaling. There is no server-side image processing.
Cert Decoder's answer:
certdecoder.com was built using just JavaScript and HTML—simple, fast, and with all processing happening locally in your browser, so no certificate data is sent to any server
PixelTools.io's answer
Anyone who works with images regularly: designers, developers, marketers, content creators, e-commerce sellers and students. It's especially popular with privacy-conscious users who'd rather not upload personal photos to a server, and with people who want quick, free tools without installing software or creating an account.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
PixelTools.io's answer
Three reasons: privacy, price, and convenience. Unlike tools such as remove.bg, TinyPNG or iLoveIMG, PixelTools never uploads your files — everything runs locally, so it's faster and fully private. It's 100% free with no credits, no watermarks, and no sign-up. And instead of juggling a different site for each task, you get convert, compress, resize, crop, background removal, AI upscaling and watermarking in a single place.
Cert Decoder's answer:
Simple, fast, and reliable. Some similar tools can’t even decode basic certificates. I rigorously tested my tool with many real-world certificates and covered several edge cases where competitors fall short.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
PixelTools.io's answer
PixelTools runs entirely in your browser — your images are processed on your device and never uploaded to a server. It bundles 8 image tools (convert, compress, resize, crop, background removal, AI upscaling, watermark, and screenshot beautifier) in one place, completely free, with no account and no file limits. Most alternatives upload your files, paywall features, or only do one thing — PixelTools is private, free, and all-in-one.
Share your experience with using PixelTools.io and Cert Decoder. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Tracking PixelTools.io since Jun 2026.
Why? Because I built certdecoder.com and couldn’t find a decent place to submit it. So I said screw it — I’ll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago
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