Programming - 101 Total Count
Encode to Base64
Decode Base64
Encode and decode text with Base64.
Online URL encoding and decoding tool supporting UTF-8 and GBK charsets.
Online URL encode and decode tool
Convert Chinese text to Unicode hex, HTML entity, and other escape formats
Unescape Unicode-encoded Chinese characters back to readable text.
Free online MD5 hash generator for text strings.
Batch generate MD5 hashes for a list of text items.
Free online SHA256 hash generator for text strings.
Free online SHA1 hash generator for text strings.
Free online SHA384 hash generator
Free online SHA512 hash generator for text strings.
Generate hash values
Free online UUID generator — batch create unique identifiers.
Free online JSON formatter, minifier, and tree viewer with multiple indent styles and syntax error detection.
Free online JSON formatting, beautifying, compression, and validation tool.
JSON text colorizing and editing tool.
Free online JSON to CSV converter
Free online JSON array to CSV converter
Free online tool to convert JSON objects to plain array format.
Free online tool to convert JSON arrays to text lists.
Free online JSON string to Java Script object literal converter
Free online Java Script object to standard JSON format converter
Free online tool to extract specific fields from JSON data.
Free online batch extract specified field values from JSON list
Free online extract all key-value pairs from JSON data
Free online merge multiple JSON objects into one JSON array
Free online merge 2 JSON data into one
Free online flatten multi-level JSON to single-level JSON
Free online restore flattened single-level JSON to multi-level JSON
Free online compare two JSONs and find missing fields
Free online JSON key-value clear tool, clear all key values while keeping key names
Split JSON array into multiple JSON files by specified length
Convert all string type key values in JSON to number type
Convert all number type key values in JSON to string type
Free online tool to convert text lists to JSON array format.
Convert key-value to Excel
Free online two-column Excel to one-dimensional key-value JSON converter
Free online Java Script beautifier or compressor
Free online CSS beautifier or compressor
Online JS code compressor, reduce file size and improve loading efficiency
Online CSS code compressor, reduce file size and improve loading efficiency
Free online CSS styles and JS scripts remover from HTML
Convert Unix timestamp and date
Parse Crontab expressions and predict future execution times.
One-click removal of HTML tags while preserving plain text content.
Free online tool to strip specified HTML tags while keeping their content.
Remove specified inline styles from HTML code
Free online HTML entity encode/decode tool for special character conversion.
Free online HTML code to JSON string converter
Convert text line breaks to HTML BR tags.
Free online CKEditor 5 rich text editor, a WYSIWYG HTML editing tool.
Generate SEO-friendly web meta tag HTML code
Get HTML source data from clipboard after copying web or Word content
Convert CSS styles to JS for dynamic insertion
Convert SCSS code to CSS code
Pick and convert colors
Free online batch random hex color code generator.
Convert colors from RGB mode to hexadecimal format.
Convert color from RGB mode to CMYK mode
Convert colors from RGB mode to HSV mode.
Convert colors from RGB mode to HSL mode.
Free online tool to bulk-extract href and src links from HTML source, with relative-to-absolute URL conversion and deduplication.
Check HTTP redirects
Free online tool to batch add http/https protocol to URL lists.
Batch remove all parameters from URL list
Analyze URL redirect information and trace the full redirect chain
Convert URL lists into standard Sitemap XML files for search engine indexing.
A developer-focused Sitemap XML link extractor — export every URL with one click, handy alongside other encoding and data-processing tools.
Extract all URL links from a Sitemap XML file.
Free online regex tester with built-in cheat sheet for mobile numbers, emails, IPs, ID numbers and more, plus match highlighting and replace preview.
Free online numeral converter — supports binary, octal, decimal, hex, and bases 2–36.
Free online tool to convert text strings to binary encoding.
Free online tool to convert binary encoding back to text strings.
Free online tool to convert text to any radix encoding between 2-36.
Free online tool to convert any radix (2-36) encoding back to text.
Free online tool that converts text characters to decimal Unicode code points, with space/comma/semicolon/HTML-entity separators and a per-character hex/binary table.
Developer-focused half-width to full-width character converter, for normalizing formatting in code strings and UI text.
Developer-focused full-width to half-width character converter, for normalizing formatting in code strings and UI text.
Free online random MAC physical address generator.
Check page title, keywords, description TDK information
Check and read web meta information such as title, description, keywords
Free online batch dead link detection tool to identify 404 broken links.
One-click User-Agent lookup with browser engine and OS version parsing.
Detect and analyze information in User-Agent string
Batch generate browser user agents for specified browser and system
Send HTTP requests to specified URLs in batch via the browser.
Send HTTP requests
Free online HTTP header to JSON converter for Request/Response headers.
Free online Cookie import code or bookmarklet generator
Free online image-to-Base64 tool with drag-and-drop upload — instantly get a Data URI, raw Base64, and CSS background code, with a live size comparison.
Convert a Base64 image data URI back into a viewable image.
Convert SVG vector images to Data URI (Base64) format.
Powerful online Excel parsing tool supporting conversion to JSON, CSV, HTML, and more.
Convert SQL DDL CREATE TABLE statements to PHP array code.
Free online RSA asymmetric encryption key pair generator
Free online Font Awesome icon to image converter
Free online tool to clean up font tags auto-added by Google page translation.
Convert text list to JS object variable code
Generate Windows desktop client software using a domain or URL