Developer Tools

Base64 Encoder / Decoder

Free online Base64 encoder and decoder. Convert plain text, URLs, or any string to Base64 and back instantly. Supports standard and URL-safe Base64. Runs entirely in your browser.

Cisco Log File Generator

Generate realistic mock Cisco log files for testing and development. Create fake IOS, ASA firewall, NX-OS, WLC, Meraki, and ISE logs with configurable severity, date range, and IP options. Free, runs in your browser.

Color Converter – Hex, RGB, HSL, HSB & CMYK

Convert any color between Hex, RGB, HSL, HSB/HSV, and CMYK instantly in your browser. Pick a color or type a value in any format and get all others at once. Free, private, no data sent to any server.

Cron Expression Validation and Explanation

Enter any cron expression and get an instant plain-English explanation of when it runs. Validates all five fields and supports */n step syntax, ranges, lists, and combinations. Free, no sign-up required.

Crontab Builder

Generate a cron expression without memorizing the syntax. Choose the schedule for each field using dropdowns for every, step, range, and specific values. The cron string updates in real time. Free, no sign-up required.

CSS Box Shadow Generator

Visually build CSS box-shadow values with live preview. Adjust offset, blur, spread, color, and opacity with sliders. Supports multiple layers and inset shadows. Copy the ready-to-use CSS in one click. Free, no login required.

CSS Minifier

Minify CSS instantly in your browser. Removes comments, collapses whitespace, and shows you exactly how many bytes you saved. No upload, no account, free.

CSV to JSON Converter – Free Online Tool

Convert CSV data to JSON instantly in your browser. Supports custom delimiters, optional headers, and pretty-print output. Free, private — no data is sent to any server.

EXIF Metadata Viewer

View hidden EXIF metadata in any JPEG or TIFF photo. See camera model, lens, shutter speed, ISO, GPS location, and more. Runs entirely in your browser — no uploads.

Favicon Generator

Turn any image into a complete favicon set: favicon.ico, PNG icons, an Apple touch icon, Android Chrome icons, a web manifest, and the HTML tags to paste into your site. Everything is generated in your browser — nothing is uploaded.

File Size Converter

Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and more. Supports both binary (KiB, MiB) and decimal (KB, MB) standards. Free, instant, browser-based file size converter.

HTML Entity Encoder / Decoder

Encode special characters into HTML entities (<, &, ") or decode HTML entities back to plain text. Fast, free, and browser-based — no data sent anywhere.

HTML Formatter

Beautify and format messy HTML instantly. Choose 2-space, 4-space, or tab indentation. See character and line counts before and after. Copy with one click. Free, browser-based, nothing uploaded.

HTTP Status Code Lookup

Quickly look up HTTP status codes and what they mean. Search by code or phrase to find practical debugging explanations for API and web responses.

JSON Beautifier

Free online JSON beautifier. Paste minified or messy JSON and instantly get it formatted with clean indentation and line breaks. Runs entirely in your browser.

JSON Formatter & Validator

Free online JSON formatter, validator and minifier. Paste your JSON to instantly validate it, pretty-print with indentation, or minify it to a single line. Runs entirely in your browser.

JSON Minifier

Free online JSON minifier. Paste formatted JSON and instantly strip all whitespace to produce the smallest possible JSON string. Runs entirely in your browser.

JSON to CSV Converter

Free online JSON to CSV converter. Paste a JSON array of objects and instantly download or copy the result as a CSV file. Runs entirely in your browser.

JSON to XML Converter

Free online JSON to XML converter. Paste any JSON object or array and instantly get well-formed XML output. Copy or download the result. Runs entirely in your browser.

JSON to YAML Converter

Instantly convert JSON to YAML or YAML to JSON in your browser. Paste your data, click convert, and copy the result. Free, private, no data sent to any server.

JWT Decoder

Decode any JSON Web Token (JWT) instantly in your browser. View the decoded header, payload claims, and signature — with expiration checking and plain-English claim explanations. Free, private, no data sent to any server.

Log File Generator

Generate realistic mock log files for testing and development. Create fake Apache access logs, Nginx logs, SSH auth logs, syslog entries, and MySQL error logs with configurable options.

Markdown Table Generator

Build markdown tables quickly with custom rows, columns, and alignment. Generate clean GitHub-flavored markdown table syntax in your browser.

Markdown to HTML Converter

Convert Markdown to HTML instantly in your browser. Supports headings, bold, italic, links, images, lists, blockquotes, code blocks, tables, and horizontal rules. No upload required.

Mock Data Generator

Free online mock data generator. Build custom datasets with realistic fake names, emails, phone numbers, addresses, dates, colors, UUIDs, and more. Export as JSON, CSV, or SQL. Runs entirely in your browser.

Regex Tester

Test and debug regular expressions online with real-time match highlighting, capture group details, and substitution preview. Supports JavaScript regex flags. Free, instant, no signup.

Screenshot Mockup Generator

Turn a plain screenshot into a polished mockup with a browser window frame, padded background, corner radius, and drop shadow. Great for portfolios, landing pages, and app store listings. Runs in your browser, no upload.

Sprite Sheet Generator

Upload a set of icons or animation frames and pack them into a single sprite sheet PNG, with matching CSS background-position classes or a JSON atlas. Runs entirely in your browser — no upload required.

SQL Formatter

Free SQL formatter for SELECT, UPDATE, INSERT, and JOIN queries. Beautify SQL with consistent indentation and keyword casing in your browser.

Text Diff Compare

Compare two blocks of text side by side and instantly see additions, deletions, and unchanged lines highlighted. Free online text difference checker — no upload, no login, runs entirely in your browser.

Unix Timestamp Converter

Convert Unix timestamps (epoch time) to human-readable dates and times, and convert dates back to Unix timestamps. Supports seconds and milliseconds. Free, runs in your browser.

URL Encoder / Decoder

Free online URL encoder and decoder. Percent-encode special characters in a URL or query string, or decode an encoded URL back to plain text. Runs entirely in your browser.

User Agent Parser

Parse user-agent strings to identify browser, OS, device class, and rendering engine. Helpful for debugging analytics and compatibility issues.

XML Formatter & Validator

Free online XML formatter, beautifier, and validator. Paste raw or minified XML to instantly format it with proper indentation, detect syntax errors, and copy or download the clean result. No upload required — all processing happens in your browser.

YAML to JSON Converter

Free YAML to JSON converter that runs in your browser. Paste YAML and instantly get formatted JSON with syntax checking. No uploads required.