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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteFree browser utilities can handle everyday developer and freelance tasks without requiring a desktop app—but “runs in your browser” is a provider claim, not proof that a tool is safe for sensitive data. The ten utility types below cover common work, from checking JSON to combining PDFs. Before using any of them, verify how that specific tool processes inputs and avoid pasting secrets or confidential client material unless you have assessed its implementation.
10 useful browser utility types
These are practical categories to look for, not a tested ranking of individual websites. BrowserUtils and offlineutils list many developer utilities; Privatool lists image and PDF tools. Their catalog pages and privacy statements are provider-authored, and a site’s general privacy claim may not apply to every tool it hosts.
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1. JSON formatter and validator
Format a compact API payload so its structure is easier to inspect, or validate JSON syntax while debugging. BrowserUtils and offlineutils list JSON formatting tools. A JSON Formatter & Validator policy also describes client-side processing while disclosing advertising and aggregate usage measurement, illustrating that browser-side processing does not necessarily mean no analytics or ads. BrowserUtils; offlineutils; JSON Formatter & Validator policy.
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2. Base64 encoder and decoder
Encode or inspect Base64 text when debugging requests and data exchanges. Base64 is an encoding format, not encryption: encoded text should not be treated as confidential. BrowserUtils and offlineutils list Base64 tools. BrowserUtils; offlineutils.
#1 Best Overall
- Compatible Model(s): Magicmoon brand filter only for 24 inch -diagonally measured - widescreen monitor - aspect ratio 16:9 - filter size: width: 20 15/16", Height: 11 13/16" (531mm x 298mm)
- Superior Privacy: The computer privacy filter makes the screen appear dark when looking at it from an angle (the angle is about 30 to 60 degree), but bright when looking directly at it. To change the privacy level - simply adjust your monitor’s brightness accordingly
- Eye and Screen Protection: Privacy Filter does not only protect your private life but also protects your eyes by blocking 30% of blue light , blocking the harmful blue light between 380 to 495 nm, it filters out the blue light and relieves eye strain
- Perfect For Open Workspaces: Great for maintaining screen privacy in open work spaces
- Includes Two Options: Option 1 uses clear adhesive strips that securely attach to any computer screen. Option 2 (for computer screens with a raised bezel only) uses slide mount tabs that easily stick to the display frame, allowing you to slide the privacy screen filter on and off as needed
3. URL encoder and decoder
Encode a URL component or decode escaped text to inspect what a request or link contains. BrowserUtils and WebUtil list URL encoding and decoding utilities. Use a component encoder for individual values rather than blindly encoding an entire URL, which can alter its separators. BrowserUtils; WebUtil.
4. Regular-expression tester
Try a pattern against sample strings and refine its matching behavior before adding it to code. BrowserUtils and offlineutils list regex testers. Use representative, non-sensitive sample data rather than customer records or private logs. BrowserUtils; offlineutils.
Rank #2
- 【Privacy Filter Dimensions】- Width: 20 15/16" (532 mm), Height: 11 13/16" (299 mm), Diagonal: 24" (609.6 mm) - SightPro Blackout Privacy Screen Filter is engineered to be compatible with HP, Dell, Samsung, Lenovo, LG, Acer, ASUS, ViewSonic, and other monitor brands. Please verify your computer screen's width and height measurements before ordering. It's not recommended to make your selection based solely on your computer screen's diagonal size.
- 【Two Attachment Options】- Installs in minutes. Option 1 uses clear adhesive strips that securely attach to any computer screen. Option 2 (for computer screens with a raised bezel only) uses slide mount tabs that easily stick to the display frame, allowing you to slide the privacy screen filter on and off as needed.
- 【Superior Privacy and Anti Glare】- Our advanced multi-layered film filter blacks out your computer screen when viewing from the side, while maintaining a crystal clear screen straight-on. It also protects your eyes from harmful glare, UV, and blue light. [Note: It does not block visibility directly behind you, regardless of the distance.]
- 【Perfect for Travel and Open Workspaces】- Our computer screen privacy filter is the ideal solution for healthcare providers, mobile workers, commuters, students, and business travelers. Now you can stay compliant and safeguard sensitive corporate information while working in airplanes, subways, airports and public areas.
- 【Package Contents】- Each package includes one privacy screen shield filter, two sets of clear adhesive strips, two sets of slide mount tabs, and a microfiber cleaning cloth. Buy with confidence – located in the US, Sight Pro specializes in providing best-in-class privacy solutions to individuals, small businesses, corporations, government, and educational institutions. Our privacy screens are Section 889 and TAA compliant.
5. JWT decoder
Inspect a JSON Web Token’s encoded header and payload during debugging. Decoding does not verify the token’s signature or prove that it is trustworthy; a live token may function as a credential, so do not paste one into a website. BrowserUtils and offlineutils list JWT decoders. BrowserUtils; offlineutils.
6. UUID generator
Generate universally unique identifiers for development workflows, such as sample records or test fixtures. BrowserUtils and offlineutils list UUID generators. Check that the generated version and format suit the system that will consume it. BrowserUtils; offlineutils.
Rank #3
![[2 Pack] 24 Inch Computer Privacy Screen Filter for 16:9 Widescreen Monitor](https://m.media-amazon.com/images/I/41SBKw3J4ML._SL160_.jpg)
- 【24 PRIVACY FILTER DIMENSIONS】 Width: 20 15/16" (20.9 inches/532 mm), Height: 11 13/16" (11.8 inches/299 mm) - 16:9 Aspect Ratio. Mamol computer privacy filters are designed to be perfectly compatible with HP, Samsung, Dell, Lenovo, Acer, Asus, LG, ViewSonic and other brands of monitors. Please check the width and height dimensions of your computer screen before ordering. If you have any questions about the dimensions, please contact us.
- 【ENHANCED PRIVACY PROTECTION】Mamol 24 inch computer privacy filter keeps your electronic information confidential, making it excellent for use in high traffic areas. the computer privacy screen 24 inch is designed with advanced microlouver technology to block visibility at around 30 degrees and black out screens completely near 60 degrees.
- 【EYES PROTECTION】 This blackout privacy screen greatly reduces eye strain and minimizes potential hazards to vision. It filters 99.9% of UV rays and suppresses 98% of blue light. As a reversible 24-inch privacy screen filter: The glossy side of the protector provides extra clarity and greater privacy, and the matte side minimizes glare and distracting reflections. Satisfy your different daily uses as needed.
- 【BETTER HD CLARTIY】Mamol 24 inch computer privacy screen Shield adds an extra layer of AR Ultra HD light transmission compared to others. It maintains the high definition of the screen without sacrificing too much screen brightness. It won't reduce the brightness and cause eye fatigue because of the privacy screen installed on the screen.
- 【ANTI SCRATCH & WASHABLE 】Our privacy anti-glare Monitor film has a surface enhancement layer to protect the privacy filter from scratches and fingerprints. It is washable and reusable. Even after prolonged use, you will get a brand new privacy screen for your desktop computer monitor after cleaning. Very Durable!
7. Hash generator
Generate a digest for a checksum or another development task. BrowserUtils and offlineutils list hash utilities. A general-purpose hash generator is not a password-storage system; password storage requires a purpose-built, slow password-hashing method and appropriate application design. BrowserUtils; offlineutils.
8. Password generator
A password generator can create a candidate credential. Use one only when you have verified that its implementation generates the password locally and does not transmit it. For important accounts, a reputable password manager’s built-in generator is often a better workflow than entering a new password into an unfamiliar web page. BrowserUtils and offlineutils list password generators, but their catalog listings are not independent security audits. BrowserUtils; offlineutils.
Rank #4
- Privacy Screen Filter Size: If the visible area of your display has the following dimension: Width x Height (Exclude Frame/Arrow 1 to 3 mm errors): 20 15/16" x 11 13/16" (532 mm x 299 mm), then this filter is good for you. Very Important to double check your screen's Width and Height excluding frame before ordering. It's not recommended to make your selection based solely on your screen's diagonal size
- Left and Right Privacy: Not block visibility directly behind you, regardless of distance. The privacy filter makes the screen appear dark when looking at it from an angle (left and right 30 to 180 degree), but clear when looking directly at it. To change the privacy levels, simply adjust your monitor's brightness level accordingly
- Matte and Glossy Sides: It's a reversible privacy screen filter, giving you the flexibility to choose glossy or matte finish. The matte side will have less glare, however the glossy side will have stronger privacy
- Perfect for Open Workspaces: Ensure your working space is bright and well lit. Privacy screens do not work in dimly lit areas
- Two Installation Option: Option 1 uses clear double side adhesive strips that securely attach to any computer screen. Option 2 (for computer screens with a raised bezel only) uses slide mount tabs that easily stick to the display frame, allowing you to take out the privacy screen filter easily as needed
9. Image compressor
Reduce image file size for delivery or sharing. Privatool lists image compression and says processing happens in the browser. That is the provider’s description, not an independent verification; check the specific tool’s disclosures before selecting a client image. Privatool.
10. PDF merger
Combine documents for a freelance delivery or administrative task. Privatool lists PDF merging and describes browser-side processing. Verify the current implementation before using client documents or other confidential files. Privatool.
Best Value
- 【PRIVACY FILTER DIMENSIONS】- Width: 23 9/16" (598 mm), Height: 13 1/4" (337 mm), Diagonal: 27" (685.8 mm) - Peslv Dark 27 inch Privacy Screen Filter is engineered to be compatible with 27in Dell, HP, Samsung, Lenovo, LG, Acer, ASUS, Toshiba, ViewSonic, Aoc, Sceptre, PHILIPS, ViewSonic and other brands monitors with 16:9 aspect ratio. Please verify your computer screen's width and height measurements before ordering. It is not recommended to select a size based solely on the diagonal.
- 【HIGH-CLASS PRIVACY ABLE】Peslv collected suggestions from more than 2000 computer users and performed 22188 anti-peep angle corrections on the micro-blind optical technology to ensure that any line of sight beyond +-30° facing the screen will be shielded. With a Peslv computer privacy screen 27 inch, Protect the privacy of your computer monitor screen and no longer leak any confidential data.
- 【2 MOUNTING OPTIONS FOR EASY INSTALLATION】The Peslv 27 inch privacy screen for monitor supply 2 installation options, Various installation options, are Compatible with both 27" computer monitors with raised bezels and full-screen 27" computer monitors without raised bezels, and convenient installation allows you to complete the installation in 10 seconds. NOTE: Monitors without raised bezels are only available with mounting option 2.
- 【EXCLUSIVE DOUBLE-SIDED TECHNOLOGY】27-inch monitor privacy filter has a double-sided surface technology developed by Peslv. Matte or Glossy. With the matte surface facing outward, you can experience the advanced AG anti-glare technology from Germany while maintaining a 30-degree privacy angle, softening the strong light outdoors, and making the screen content clearly visible. With the glossy side facing outward, you can get a super anti-peeping effect with a privacy angle of 26 degrees.
- 【PROTECT SCREEN ALSO EYES】Filtering optical materials imported from Japan can reduce 92% of blue light and 98% of UV light, and filter all harmful light emitted from the screen to protect your eyes. The high-transparent and reinforced built-in protective layer not only presents high-definition picture quality but also protects your screen from scratches. Hurry up and place an order, own a privacy screen for a computer monitor 27 inch, and protect your monitor screen and your eyes.
What “privacy-first” should mean before you paste or upload
A web app must be delivered to your browser, but that does not establish where your input is processed. A particular tool may perform its work locally, or send data to a service for server-side processing. Even when file contents stay in the browser, the site may still collect page-view analytics or use advertising. Treat privacy as a tool-specific question, not a property you can infer from a catalog’s name or a site-wide slogan.
- Find a disclosure for the exact utility. Look for whether processing is local or server-side, and whether the site identifies tools that upload data.
- Read the relevant privacy details. Check what the provider says about input retention, logs, analytics, ads, and third-party sharing. “We do not receive files” does not automatically mean the site collects no other information.
- Check account requirements and practical constraints. Confirm whether registration is needed and whether the tool supports your input format and file size. The cited catalogs do not establish comparative performance, browser compatibility, or universal file limits; check the live tool for the conditions that matter to your task.
- Use harmless sample data for a network check. If you are comfortable inspecting browser developer tools, observe network requests while using a non-sensitive sample. A request check can help you see whether data appears to be sent, but it is not a complete security audit.
- Keep high-impact data out of unverified tools. Do not paste production secrets, private keys, live authentication tokens, customer data, or confidential client material until you have assessed the specific implementation and are authorized to use it.
The providers’ own catalog claims are useful starting points, not independent audits. BrowserUtils describes 299 tools in 2026 and says 99% run in the browser, while acknowledging some server-side tools. offlineutils describes its catalog as browser-based and reports “70+” developer and creator utilities in 2026. Privatool describes 106 tools in 2026, says files are processed in-browser, and separately discloses anonymous page-view analytics. Those are provider-reported descriptions and counts, not independently verified measurements. BrowserUtils; offlineutils; Privatool.
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