Recommended Free Tools
iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Developer divsince1999 says the motivation for building a suite of more than 233 browser-based utilities was simple: developers repeatedly need small tools for everyday work. The examples in the available DEV Community excerpt include formatting malformed JSON, inspecting JWT claims, and generating a multi-stage Dockerfile. The title also claims the tools run in the browser with “Zero Server Uploads,” but that behavior—and the stated tool count—cannot be independently verified from the available listing.
What reason does the author give for building the tools?
In a DEV Community trend listing dated August 22, 2026, author divsince1999 describes developers reaching for online utilities multiple times each day. The excerpt names three recurring tasks: formatting malformed JSON from an API, decoding a JWT to inspect its claims, and generating a multi-stage Dockerfile. It presents the suite as a response to that routine demand for focused, single-purpose tools.
The excerpt is brief and ends after the Dockerfile example begins; it does not expose a full catalog, implementation details, or a complete explanation of the author’s design choices. The number “233+” appears in the title as the author’s claim, rather than as a count corroborated by the listing.
What does “100% in the browser” mean?
In general, browser-based processing can handle user-provided data on the device. The browser’s File API lets a web application read files selected through a file input or supplied by drag-and-drop; FileReader can read File or Blob contents asynchronously, including in a worker. These capabilities make local processing possible, but they do not establish that any particular website keeps data local.
#1 Best Overall
- [2 Pack] This product includes 2 pack privacy screen protectors.WORKS FOR iPhone 17e/16e/14/iPhone 13/13 Pro 6.1 Inch tempered glass screen protector.Featuring maximum protection from scratches, scrapes, and bumps.[Not for iPhone 16 6.1 inch, iPhone 13 mini 5.4 inch, iPhone 13 Pro Max/iPhone 14 Pro Max/iPhone 14 Plus 6.7 inch, iPhone 14 Pro 6.1 inch]
- Specialty: to enhance compatibility with most cases, the Tempered glass does not cover the entire screen. HD ultra-clear rounded glass for iPhone 17e/16e/14/iPhone 13/13 Pro is 99.99% touch-screen accurate.
- 99.99% High-definition clear hydrophobic and oleophobic screen coating protects against sweat and oil residue from fingerprints.
- High Privacy: Keeps your personal, private, and sensitive information hidden from strangers,screen is only visible to persons directly in front of screen.Good choose when you are in the bus,elevator,metro or other public occasions.(Note: Due to this privacy cover will darken the image to prevent the peeking eyes near you, you might need to turn your device display brightness up a bit when use it.)
- Online video installation instruction: Easiest Installation - removing dust and aligning it properly before actual installation,enjoy your screen as if it wasn't there.
A web page can still send data over the network even when it also uses browser APIs. To establish that a specific tool does not upload inputs, its actual code or network requests need to be examined. The available DEV listing does not provide that evidence for this suite, so “Zero Server Uploads” remains a claim in the title, not a verified privacy guarantee.
What browser-local processing can—and cannot—tell you
| Consideration | What browser-local processing generally means |
|---|---|
| Data exposure | Inputs may be processed on the user’s device rather than sent to a server. That possibility does not prove a particular tool avoids network transmission. |
| Network dependence | Local computation can reduce dependence on a server for the processing step, but this does not establish that a site works offline or that every feature is available without a connection. |
| Device resources | Processing uses local device resources. Web Workers can move computation off the page’s main thread, but the page and worker exchange messages, and structured-cloned values are generally copied between contexts. The suite’s architecture and performance are not documented in the listing. |
| File access | Browser file APIs allow access to files a user provides. File System Access extensions require user permission; the origin-private file system is private to a document’s origin. The listing does not establish that this suite uses these APIs. |
| Proof of behavior | Browser API availability describes what a site could do, not what it does. Verifying a no-upload claim requires evidence about the site’s code or observed network traffic. |
What is and is not established about this suite?
- Stated motivation: the author describes recurring needs for small developer utilities and names JSON formatting, JWT inspection, and Dockerfile generation as examples.
- Unverified count: “233+” is a title claim; the indexed listing does not expose an inventory that confirms it.
- Unverified privacy behavior: “Zero Server Uploads” is also a title claim. The listing does not include a privacy policy, technical description, or network evidence that would verify it.
- Unknown implementation and availability: the listing does not document the tools’ full set, current status, compatibility, performance, or offline behavior.
These limits apply to what the available listing establishes; they do not show that the claims are false. They mean readers should distinguish the author’s stated goal from independently demonstrated behavior.
Quick Recap
Best Value
- 【Industry-Leading 100% Anti-Spy Privacy Protection】Designed for iPhone 17 Pro Max. Larger iPhone screens are easier for others to glance at, so UltraGlass uses patented, SEGI-certified 25° Blackout-3 optical technology to help block side views and keep emails, banking apps, and private content visible only to you—while keeping the front view HD-clear and comfortable through hours of scrolling and streaming.
- 【Unbreakable TOP 9H+ Glass, the Excellent 2nd Screen for Your iPhone】Boasting unparalleled shatter resistance and durability. And the core excellence is the top 9H+ tempered glass material, which is widely applied in aerospace and military fields for its ① Shatter-proof ② Scratch & Wear Resistance ③ Durability that is 7-8 times higher than other materials. Thus, UltraGlass builds a second tough screen for your iPhone 17 Pro Max.
- 【Industry NO.1 Military-Grade Shatterproof】Authorized by the International Military Standard with 50+ rigorous engineering tests of 220 lbs impact, 8,000+ drop tests, 25,000+ scratch tests, etc., its strength, toughness and durability perform NO.1 among all glass. By especially breaking the industry's record with a 12ft drop, the iPhone 17 Pro Max screen protector is ensured to be unbreakable from its surface to every edge and corner.
- 【Invisible Armor, 1:1 Full Covers the iPhone's Screen】Mimicking the iPhone's original screen design, it uses a 1:1 3D curved reinforced black edge that wraps around every curve — case friendly — while securing even the most vulnerable edges. Seamlessly blending with the iPhone 17 ProMax screen, it's virtually invisible and feels like the original screen while offering enhanced full-screen protection.
- 【0 Bubbles + 0 Dust + 0 Misaligned =100% Successful Installation】Includes everything you need with pioneering automatic positioning, dust removal, and absorption technology, making the installation just effortlessly easy in seconds. No bubbles, no troubles—transforming beginners into experts!
Rank #4
- [3+3 Pack] This product includes 3 pack privacy screen protectors and 3 pack camera lens protectors with Installation Frame. Works For iPhone 16 [6.1 inch] tempered glass screen protector and camera lens protector. Featuring maximum protection from scratches, scrapes, and bumps. [Not for iPhone 16e 6.1 inch, iPhone 16 Pro 6.3 inch, iPhone 16 Pro Max 6.9 inch, iPhone 16 Plus 6.7 inch]
- Night shooting function: specially designed iPhone 16 6.1 Inch camera lens protective film. The camera lens protector adopts the new technology of "seamless" integration of augmented reality, with light transmittance and night shooting function, without the need to design the flash hole position, when the flash is turned on at night, the original quality of photos and videos can be restored.
- High Privacy: Keeps your personal, private, and sensitive information hidden from strangers, screen is only visible to persons directly in front of screen. Good choose when you are in the bus,elevator,metro or other public occasions. (Note: Due to this privacy cover will darken the image to prevent the peeking eyes near you, you might need to turn your device display brightness up a bit when use it.)
- Easiest Installation - Please watch our installation video tutorial before installation. Removing dust and aligning it properly with the help of the included installation frame before actual installation, enjoy your screen as if it wasn't there.
- 99.99% High-definition clear hydrophobic and oleophobic screen coating protects against sweat and oil residue from fingerprints, and enhance the visibility of the screen.
Rank #3
- [3 Pack] This product includes 3 pack privacy screen protectors.WORKS FOR iPhone 16/iPhone 15/iPhone 15 Pro 6.1 Inch tempered glass screen protector. Due to the rounded edge design of the iPhone 16/iPhone 15/iPhone 15 Pro and to enhance compatibility with most cases,the tempered glass screen protectors will be slightly smaller than the phone screen.[Not for iPhone 16e 6.1 inch, iPhone 15 Plus/iPhone 15 Pro Max/iPhone 16 Plus 6.7 inch,iPhone 16 Pro 6.3 inch,iPhone 16 Pro Max 6.9 inch]
- Specialty: HD rounded glass for iPhone 16/iPhone 15/iPhone 15 Pro 6.1 Inch is 99.99% touch-screen accurate.
- 99.99% High-definition hydrophobic and oleophobic screen coating protects against sweat and oil residue from fingerprints. Featuring maximum protection from scratches, scrapes, and bumps.
- High Privacy: Keeps your personal, private, and sensitive information hidden from strangers,screen is only visible to persons directly in front of screen.Good choose when you are in the bus,elevator,metro or other public occasions.(Note: Due to this privacy cover will darken the image to prevent the peeking eyes near you, you might need to turn your device display brightness up a bit when use it.)
- Online video installation instruction: Easiest Installation - removing dust and aligning it properly before actual installation,enjoy your screen as if it wasn't there.
Rank #2
- Perfect Fit for iPhone 17 Pro Max：Engineered exclusively for iPhone 17 Pro Max with seamless edge-to-edge coverage, ensuring precise alignment and reliable full-screen protection.
- Advanced Privacy Protection：Features a 28° privacy filter with smooth 2.5D curved edges, preventing side glances in public. Your screen remains visible only to you—ideal for commuting, traveling, and crowded environments.
- Effortless Installation：Equipped with an auto dust-elimination tool that delivers a fast, accurate, and bubble-free application, keeping your screen perfectly clear with minimal effort.
- Military-Grade Protection：Made of nano-reinforced 9H tempered glass, SGS certified. Provides 5X stronger scratch resistance and proven durability, withstanding thousands of pressure and impact tests.
- Smudge & Fingerprint Resistant：Hydrophobic and oleophobic coating repels fingerprints, sweat, and oil—ensuring your screen stays clean, clear, and smooth to the touch.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
