What to Mask Before Sending Code to AI or ChatGPT
Before entering code into AI or ChatGPT, identify API keys, customer data, internal URLs, identifiers, and other sensitive information, then mask them safely.
Guides and Troubleshooting
We have summarized how to safely use browser tools, how to choose a format, specific operating procedures, and items to check when a problem occurs.
Safe Use and Data Handling
- In-Browser Processing and Data Handling
- Code and Log Masking Checklist
- How to Choose a Code and Data Masking Tool
When a problem occurs
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Share code and data securely
How to Mask SQL Table Names, Column Names, and Values
Mask table names, column names, query values, and comments while preserving SQL structure before sharing a statement.
How to Remove Sensitive Data from JSON and API Responses
Mask keys, strings, numbers, personal data, and authentication details while preserving the nested structure of JSON and API responses.
How to Mask IP Addresses, URLs, and Credentials Before Sharing Logs
Mask IP addresses, URLs, tokens, credentials, and user information before sharing Log4j, Syslog, JSON Lines, or access logs.
How to mask CSV and TSV personal information in columns and cells
Before sharing CSV and TSV of customer list and test data, we will explain the procedure to mask the name, email address, phone number and ID.
How to mask XML elements, attributes, and CDATA
Before sharing an XML file, we will explain how to mask element text, attribute value, and CDATA’s personal information and authentication information with a hierarchy and namespace.
How to safely mask and share Bash code
This article explains the procedure for masking function names, variable names, arguments, arrays, environment variable names, strings, and numbers while preserving the structure of Bash operation and deployment scripts.
How to safely mask and share COBOL code
This article explains the procedure for masking PROGRAM-ID, section names, paragraph names, data item names, file names, character strings, and numerical values while preserving the structure of COBOL fixed-format and free-format programs.
How to safely mask and share Objective-C code
We will explain the procedure for masking classes, categories, protocols, methods, properties, variables, strings, and numbers while maintaining their structure for Objective-C interfaces, implementations, and message expressions.
How to safely mask and share Ruby code
We will explain the steps to mask modules, classes, methods, variables, symbols, constants, strings, and numbers while maintaining their structure, targeting Ruby classes, methods, and symbols.
How to safely mask and share Swift code
We will explain the steps to mask modules, classes, structs, protocols, functions, properties, strings, and numbers while preserving their structure, targeting Swift types, protocols, and closures.
How to safely mask and share Rust code
We will explain the steps to mask Rust types, traits, functions, and macros while preserving their structure: crates, modules, structs, enums, traits, functions, variables, strings, and numbers.
How to safely mask and share VBA code
We will explain the steps to mask module names, procedure names, variable names, sheet names, range names, strings, and numbers while maintaining their structure, targeting VBA procedures, cell references, and object operations.
How to safely mask and share VB.NET code
We will explain the procedure for masking namespaces, classes, methods, properties, variables, strings, and numbers while preserving the structure of VB.NET classes, methods, and properties.
How to safely mask and share PHP code
This article explains the procedure for masking class names, function names, variable names, array keys, constant names, strings, and numbers while preserving the structure of PHP classes, functions, and arrays.
How to Mask TypeScript Types and API Data
Learn how to mask TypeScript types, interfaces, functions, variables, strings, and numbers without losing the overall code structure.
How to safely mask and share C# code
We will explain the procedure for masking namespaces, types, methods, properties, fields, variables, strings, and numbers while preserving the structure of C# namespaces, classes, and attributes.
How to Mask C++ Classes, Templates, and Strings
Mask namespaces, classes, methods, variables, templates, and strings in C++ code while keeping the code structure readable.
How to Mask C Source Code Safely
Learn how to mask function names, variables, strings, numbers, comments, and macros in C source code while preserving its structure.
How to safely mask and share Python code
This article explains the procedure for masking module names, class names, function names, variable names, argument names, strings, and numbers while preserving the structure of Python classes, functions, and decorators.
How to safely mask and share jQuery code
We will explain the procedure for masking function names, variable names, ID/class selectors, data attributes, strings, and numbers while maintaining their structure, targeting jQuery selectors and event processing.
How to safely mask and share Vue code
We will explain the steps to mask the component name, props, emits, variables, methods, strings, and numbers while maintaining the structure of Vue's Single File Component.
How to safely mask and share React code
We will explain the procedure for masking component names, Hooks, props, functions, state variables, strings, and numbers while preserving the structure of React's JSX/TSX components.
Convert images, videos, and audio
How to Extract Audio from MP4, WebM, and MOV Files
Extract only the audio track from a video file in your browser, save it as WAV or another audio format, and review important limitations.
How to Extract Frames from GIFs and Videos
Extract every frame or still images at a chosen interval from GIF, MP4, WebM, MOV, and other video files.
PNG vs JPEG vs WebP: Differences and Best Uses
Compare PNG, JPEG, and WebP by image quality, transparency, file size, and best use, then learn how to convert image formats in your browser.
How to Convert Video to GIF and Reduce File Size
Convert MP4, WebM, MOV, and other videos to GIF, and reduce file size by adjusting duration, frame rate, resolution, and color count.
WAV vs MP3 vs OGG (Vorbis): Differences and Conversion
Compare WAV, MP3, and OGG (Vorbis) in audio quality, file size, and compatibility, then learn how to convert between them in your browser.
Create Single-Image Videos from Images and Audio | Complete guide to use, settings, and troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for the tool that creates single-image videos from images and audio.
SVG image conversion tool | Complete guide to usage, settings, and troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for the SVG image conversion tool.
SVG optimization and compression tool | Complete guide to usage, settings, and troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for the SVG optimization and compression tool.
Image Datamosh and Glitch Effects Tool | Complete guide to use, settings, and troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for the Image Datamosh and Glitch Effects Tool.
Video Datamosh and Glitch Processing Tool | Complete Guide to Usage, Settings, and Troubleshooting
A concise overview of the video datamosh and glitch processing tool's basic operations, settings, use cases, and troubleshooting.
View data files
How to View Large CSV and TSV Files Without Excel
Open CSV and TSV files as tables, check the delimiter, text encoding, and column widths, and learn what to consider when handling large datasets.
How to View SQLite Database Files Without Installing Software
Read SQLite 3 database files such as .db, .sqlite, and .sqlite3 in your browser, then inspect their tables, columns, and row data.
CSV/TSV to TXT Converter | Comprehensive Guide to Usage, Settings, and Troubleshooting
A concise overview of the CSV/TSV to TXT converter's basic operations, settings, use cases, and troubleshooting.
JSON Formatter, Minifier, and Syntax Checker | Comprehensive Guide to Usage, Settings, and Troubleshooting
A concise overview of the basic operations, settings, use cases, and troubleshooting for the JSON formatter, minifier, and syntax checker.
JSON Tree Viewer | Complete guide to usage, settings, and troubleshooting
Briefly summarizes the basic operations, settings, use cases, and troubleshooting for JSON Tree Viewer.
YAML Formatting, Syntax Check, and JSON Conversion Tool | Complete guide to usage, settings, and troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for the YAML Formatting, Syntax Check, and JSON Conversion Tool.
XML Formatting, Minification, and Syntax Check Tool | Complete guide to usage, settings, and troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for the XML Formatting, Minification, and Syntax Check Tool.
SQL formatting, compression, and syntax-check tool | Complete guide to usage, settings, and troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for the SQL formatting, compression, and syntax-check tool.
Base64 Encoder / Decoder | Comprehensive Guide to Usage, Settings, and Troubleshooting
A concise overview of the Base64 Encoder / Decoder's basic operations, settings, use cases, and troubleshooting.
URL Encoder / Decoder | Complete guide to usage, settings, and troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for URL Encoder / Decoder.
Parse a URL | Complete guide to usage, settings, and troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for parsing URLs.
Convert UNIX time and dates/times | Complete guide to usage, settings, and troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for converting UNIX time and dates/times.
Base Conversion Tool | Complete Guide to Usage, Settings, and Troubleshooting
A concise overview of the base conversion tool's basic operations, settings, use cases, and troubleshooting.
Check the number of available IPs | Complete guide to usage, settings, and troubleshooting
A concise summary of basic operations, settings, use cases, and troubleshooting for checking the number of available IPs.
Special Characters and Stylish Text Conversion Tool | Complete Guide to Usage, Settings, and Troubleshooting
A concise overview of the special characters and stylish text conversion tool's basic operations, settings, use cases, and troubleshooting.
Unicode code table and character-code search tool | Complete guide to usage, settings, and troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for the Unicode code table and character-code search tool.
Character and byte count tool | Complete guide to usage, settings, and troubleshooting
A concise summary of basic operations, settings, use cases, and troubleshooting for the character and byte count tool.
HTML Web Archive Creation and Save Tool | Complete guide to usage, settings, and troubleshooting
Briefly summarizes the basic operations, settings, use cases, and troubleshooting for the HTML Web Archive Creation and Save Tool.
Enter and Check Formula Delimiters | Complete Guide to Usage, Settings, and Troubleshooting
A concise overview of the basic operations, settings, use cases, and troubleshooting for entering and checking formula delimiters.
Look up ASCII codes from characters | Complete guide to usage, settings, and troubleshooting
A concise summary of basic operations, settings, use cases, and troubleshooting for looking up ASCII codes from characters.
SQL reserved words and Keywords list | Complete guide to usage, settings, and troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for the SQL reserved words and Keywords list.
MIME Type List and Extension Search | Comprehensive Guide to Usage, Settings, and Troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for MIME type list and extension search.
HTML Entity List and Character Reference Conversion Tool | Complete guide to usage, settings, and troubleshooting
Briefly summarizes the basic operations, settings, use cases, and troubleshooting for the HTML Entity List and Character Reference Conversion Tool.
How to edit PDF in a browser and add text, signatures, and images
We will explain the steps to add text, images, shapes, and handwritten signatures to PDF, and rotate, rearrange, delete, and combine pages within the browser.
How to Generate JSON Schema from JSON Samples
Learn how to infer types, required properties, arrays, and formats from API responses or configuration JSON, then refine the generated JSON Schema safely.
How to Validate JSON with JSON Schema and Locate Errors
Learn how to validate JSON with Draft 2020-12 or Draft-07 schemas and trace type, required, format, and JSON Pointer errors to their source.
How to Test Regular Expression Matches and Replacements
Test flags, match ranges, capture groups, and replacement output, then check for unintended matches and expensive patterns.
How to Test JSONPath and Extract Values from JSON
Learn how to search API responses and configuration JSON with JSONPath, inspect normalized paths and JSON Pointers, and validate filters safely in your browser.
How to preview and check Markdown in a browser
We will explain how to read Markdown files and text, preview headings, tables, lists, codes, and links to check the HTML display.
How to find out the meaning, causes, and solutions for HTTP status codes
We will explain how to search for HTTP status codes 100 to 511 and check their meanings, main causes, client/server side actions, retries, caching, and differences between similar codes.
Check device operation
How to Check Keyboard Chattering and Duplicate Keystrokes
Learn how to test keystrokes, simultaneous key presses, Caps Lock, and duplicate input caused by keyboard chattering in your browser.
How to Test Your Webcam in a Browser Before a Video Meeting
Before a video meeting, check camera selection, video, resolution, horizontal and vertical mirroring, snapshots, and recording in your browser.
How to Test Microphone Level, Frequency, and Recording in Your Browser
Before a video meeting or recording, check microphone input level, the frequency spectrum, background noise, and a test recording in your browser.
How to Analyze a User-Agent and Identify the Browser, OS, and Device
Learn how to use a User-Agent string to identify the likely browser, OS, device type, rendering engine, WebView, or bot, and understand the limits of this inference.
How to Test MIDI Keyboard Notes, Velocity, and Pedals
Check MIDI note numbers, velocity, channels, simultaneous notes, and sustain pedal input directly in your browser.
How to Test Gamepad Buttons, Sticks, and Dead Zones
Check gamepad buttons, directional input, analog sticks, triggers, maximum values, and dead zones in your browser.
How to Test Mouse and Trackball Input
Test mouse and trackball clicks, double-click symptoms, dragging, wheel direction, side buttons, and pointer movement.
How to Check a Display for Dead Pixels and Color Uniformity
Use solid colors, gradients, and grid patterns to check a display for dead pixels, stuck pixels, light bleed, and color unevenness.
How to Measure Display Refresh Rate and FPS
Measure browser frame timing to estimate display refresh rate and FPS, then check frame drops and rendering stability.
How to Check Device and Browser Information
Check OS, browser, screen, CPU, memory, GPU, User-Agent, and Web API support, then share the relevant device information when troubleshooting.
IP Address and Connection Environment Check Tool | Complete guide to usage, settings, and troubleshooting
Briefly summarizes the basic operations, settings, use cases, and troubleshooting for the IP Address and Connection Environment Check Tool.
Clock Drift Check Tool | Complete Guide to Usage, Settings, and Troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for the clock drift check tool.
Generate and check safe values
Analyze JWTs | Comprehensive Guide to Usage, Configuration, and Troubleshooting
A concise overview of the basic operations, settings, use cases, and troubleshooting for parsing JWTs.
Convert rwx Permissions to chmod Numbers | Comprehensive Guide to Usage, Configuration, and Troubleshooting
Briefly summarizes the basic operation, settings, use cases, and troubleshooting for converting rwx to numeric chmod notation.
Linux Command List and Search Cheat Sheet | Comprehensive Guide to Usage, Configuration, and Troubleshooting
A concise overview of the basic operations, settings, use cases, and troubleshooting for the Linux command list and search cheat sheet.
Create a Password with a Specified Character Count | Complete Guide to Usage, Settings, and Troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for creating a Password with a specified character count.
Generate a SHA-256 Hash | Complete Guide to Usage, Settings, and Troubleshooting
Briefly summarizes the basic operation, settings, use cases, and troubleshooting for generating SHA-256 hashes.
Generate UUIDv4 | Complete guide to usage, settings, and troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for generating UUIDv4.
Generate a GUID | Complete guide to usage, settings, and troubleshooting
Briefly summarizes the basic operations, settings, use cases, and troubleshooting for Generate a GUID.
.gitignore Generator | Comprehensive Guide to Usage, Settings, and Troubleshooting
A concise overview of the .gitignore generator's basic operations, settings, use cases, and troubleshooting.
Generate an Ed25519 SSH Key for GitHub | Comprehensive Guide to Usage, Settings, and Troubleshooting
A concise overview of the basic operations, settings, use cases, and troubleshooting for generating an Ed25519 SSH key for GitHub.
How to Analyze Cookie and Set-Cookie Attributes for Security
We will explain the steps to analyze the Cookie/Set-Cookie header's Secure, HttpOnly, SameSite, Domain, Path, and expiration date to check for safety and configuration errors.
How to check CSP/CORS/cache settings by parsing HTTP headers
We will explain the steps to analyze HTTP request/response headers and check the settings of CSP, HSTS, CORS, cache, cookies, and confidential information.
How to Check an X (Twitter) Shadowban or Visibility Restriction
Learn how to compare an X profile, search results, recent posts, and replies across multiple viewing conditions without treating one result as definitive proof of a shadowban.
Check file differences
How to Compare Two Text or Configuration Files
Compare two text files, configuration files, or source files by line and character to identify additions, deletions, and changes.
How to Compare Two Images Pixel by Pixel
Compare two images side by side or as an overlay, then highlight differences to find pixel-level changes and alignment shifts.
Streamline production and work
cURL Code Converter | Comprehensive Guide to Usage, Settings, and Troubleshooting
A concise overview of the cURL code converter's basic operations, settings, use cases, and troubleshooting.
Convert HTML to Markdown | Complete guide to usage, settings, and troubleshooting
Briefly summarizes the basic operations, settings, use cases, and troubleshooting for Convert HTML to Markdown.
Read QR Code Images | Complete Guide to Usage, Settings, and Troubleshooting
Briefly summarizes the basic operation, settings, use cases, and troubleshooting for reading QR code images.
Read Barcode Images | Complete guide to use, settings, and troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for Read Barcode Images.
Create a Cron Expression from the Date and Time You Want to Run | Complete Guide to Usage, Settings, and Troubleshooting
Briefly summarizes basic operations, settings, use cases, and troubleshooting for creating a Cron expression from the date and time you want to run.
Color Picker and Color Code Converter | Complete guide to use, settings, and troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for the Color Picker and Color Code Converter.
Zalgo Text Generator and Remover | Complete guide to use, settings, and troubleshooting
A concise overview of basic operations, settings, use cases, and troubleshooting for the Zalgo Text Generator and Remover.
API Mock Data Generator | Comprehensive Guide to Usage, Settings, and Troubleshooting
A concise overview of the API mock-data generator's basic operations, settings, use cases, and troubleshooting.
How to manage work time and breaks with Pomodoro timer
We will explain how to set up a Pomodoro timer that repeats 25 minutes of concentration and short breaks, how to use notifications, long breaks, and work records.
How to search and copy emojis by Japanese name/Unicode code
This section explains how to search for the desired emoji from the emoji list by Japanese name, English name, keyword, or Unicode code, check variations such as skin color, and code notation, and then copy.
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