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Developer
Use this collection for code, text, formatting, data cleanup, and developer-facing conversions. These tools are most useful when you need to verify structure, normalize input, or move between formats without leaving the browser.
In this category
Browse all tools 64 tools
JSON Formatter
Format, validate, minify and copy JSON locally.
Open toolBase64 Encoder
Encode or decode text in your browser.
Open toolText to Base64
Encode arbitrary Unicode text to standard Base64 directly in your browser.
Open toolBase64 to Text
Decode standard Base64 UTF-8 text back into the original Unicode text in your browser.
Open toolHash Generator
Generate SHA hashes from text instantly in your browser.
Open toolNumber Base Converter
Convert numbers between binary, octal, decimal, hexadecimal and custom bases from 2 to 36.
Open toolNumber to Words Converter
Convert numbers into English words instantly in your browser.
Open toolRoman Numerals Converter
Convert numbers to Roman numerals and Roman numerals back to numbers instantly in your browser.
Open toolRegex Tester
Test regular expressions against text locally.
Open toolDOCX to Markdown Converter
Convert Word DOCX documents to Markdown locally while preserving headings, formatting, lists, links and tables.
Open toolWord Counter
Count words, characters, sentences and lines locally.
Open toolRemove Duplicate Lines
Remove repeated lines while preserving their original order.
Open toolSort Lines
Sort text lines alphabetically, numerically, or by case with dedupe and empty-line control.
Open toolSpeech to Text
Transcribe microphone speech through the browser's Web Speech API. Recognition support and audio handling depend on the browser or operating-system speech service and may require a network connection.
Open toolText to Speech
Convert text into spoken audio directly in the browser using the Web Speech API.
Open toolSlug Generator
Convert titles and text into clean URL-friendly slugs.
Open toolNew Line to Comma
Join lines with comma-space separators while preserving line whitespace; blank lines remain empty comma-separated entries.
Open toolReplace Spaces with Commas
Replace each run of whitespace between values with one comma; leading and trailing whitespace is ignored.
Open toolReplace Spaces with Semicolons
Replace each run of whitespace between values with one semicolon; leading and trailing whitespace is ignored.
Open toolNew Line to Semicolon
Join lines with semicolons while preserving line whitespace; blank lines remain empty semicolon-separated entries.
Open toolColumn to Comma
Join one-value-per-line input with commas and no added spaces; line whitespace is preserved and blank lines remain empty entries.
Open toolComma to Column
Split comma-separated values into lines, trimming surrounding whitespace and ignoring empty values.
Open toolSemicolon to Column
Split semicolon-separated values into lines, trimming surrounding whitespace and ignoring empty values.
Open toolSpace to Column
Split on whitespace runs into one value per line, ignoring leading, trailing, and empty values.
Open toolColumn to Semicolon
Join one-value-per-line input with semicolons; leading and trailing whitespace is trimmed and empty lines are ignored.
Open toolCSV to Markdown Table
Convert CSV data into a clean Markdown table locally.
Open toolRegex Replacer
Find and replace text with regular expressions locally.
Open toolUpper Case
Convert text to uppercase while preserving its structure.
Open toolLower Case
Convert text to lowercase while preserving its structure.
Open toolProper Case
Capitalize each word while preserving text structure.
Open toolCase Converter
Convert text to sentence or title case locally.
Open toolCron Reader
Explain standard five-field cron expressions in plain language.
Open toolUUID Generator
Generate secure UUID v4 identifiers locally in your browser.
Open toolText Diff
Compare two text inputs and highlight additions, removals and changed lines locally.
Open toolCSS Gradient Generator
Generate linear and radial CSS gradients locally in your browser.
Open toolASCII ↔ Text Converter
Convert standard ASCII character codes to text and text to ASCII directly in your browser.
Open toolNATO Phonetic Alphabet Converter
Convert text to the NATO phonetic alphabet or decode NATO phonetic words directly in your browser with Zobnu.
Open toolHEX ↔ Text Converter
Convert UTF-8 text to hexadecimal bytes and hexadecimal bytes back to text locally in your browser.
Open toolHEX ↔ ASCII Converter
Convert standard ASCII characters to HEX and HEX values from 00 to 7F back to ASCII locally.
Open toolURL Encoder & Decoder
Encode and decode URL components or full URIs locally in your browser.
Open toolHTML Encoder & Decoder
Encode HTML special characters into entities and decode entities back to plain text locally.
Open toolText ↔ Binary Converter
Convert text to 8-bit UTF-8 binary and binary bytes back to text locally in your browser.
Open toolROT13 Encoder & Decoder
Encode and decode English letters with ROT13 while preserving all other characters locally.
Open toolCaesar Cipher
Encrypt and decrypt text using a configurable Caesar shift directly in your browser.
Open toolText ↔ Morse Code Converter
Convert text to International Morse Code and decode Morse Code to text locally.
Open toolText ↔ Base32 Converter
Encode text to standard RFC 4648 Base32 or decode Base32 to text locally.
Open toolText ↔ Base58 Converter
Encode text to Base58 or decode Base58 back to text locally.
Open toolJWT Decoder
Decode and inspect JWT headers and payloads directly in your browser.
Open toolXML to JSON
Convert XML into readable JSON locally in your browser.
Open toolJSON to YAML
Convert JSON into readable YAML locally in your browser.
Open toolYAML to JSON
Convert YAML into readable JSON locally in your browser.
Open toolAdd Double Quotes
Wrap each text line in double quotes while preserving its content.
Open toolReverse Text
Reverse text, lines or word order locally while respecting Unicode characters.
Open toolTabs to Spaces
Convert tab characters into a chosen number of spaces locally.
Open toolSpaces to Tabs
Convert space groups into tab characters locally with safe indentation controls.
Open toolRemove Empty Lines
Remove empty or whitespace-only lines from text locally in your browser.
Open toolLorem Ipsum Generator
Generate editable Lorem Ipsum placeholder text locally in your browser.
Open toolSQL Formatter
Format common SQL queries into readable structure locally in your browser.
Open toolMarkdown to HTML
Convert Markdown into selectable HTML source locally in your browser.
Open toolMarkdown to PDF Converter
Convert Markdown into a readable PDF document directly in your browser without uploading your content.
Open toolHTML to PDF Converter
Convert HTML to PDF locally with a safe preview and browser-only processing.
Open toolHTML to Markdown
Convert practical HTML into readable Markdown locally in your browser.
Open toolCSS Formatter
Beautify CSS into readable, consistently indented code locally in your browser.
Open toolUnicode Text Styler
Transform text into Unicode-styled variants directly in your browser.
Open toolMore categories
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Published articles
How to work with Base64 encoding and decoding
Use Base64 when data must be represented as plain text, and decode it carefully when checking a payload or token.
Read articleHow to convert text between common formats
Use text transformations to make a list, script, or data block easier to share, compare, or import.
Read articleHow to use developer encoding and decoding tools
Use encoding and decoding tools to inspect tokens, payloads, and structured data without relying on guesswork.
Read articleWhy local JSON validation is useful
Keep payloads in the browser while you check structure, formatting, and errors without sending data elsewhere.
Read article