Developer Tools
Explore 50+ free, secure developer utility tools for comparison, formatting, validation, and conversion. Everything runs locally in your browser.
Comparison Tools
Compare text, code, files, JSON, XML, and CSV side-by-side or inline with visual diffs.
Text Diff Checker
Compare two text snippets side-by-side or inline. Highlight differences, additions, and deletions down to the character level.
Open ToolJSON Diff Checker
Compare two JSON objects side-by-side. Highlights missing keys, value differences, and structural modifications.
Open ToolXML Diff Checker
Find differences between two XML structures. Highlights additions, deletions, and structural variations.
Open ToolYAML Diff Checker
Compare two YAML files or snippets. Highlight indentation and value modifications side-by-side.
Open ToolCSV Diff Checker
Compare two CSV files. Detect added, removed, and modified rows and cells in a clean grid view.
Open ToolHTML Diff Checker
Compare HTML source codes side-by-side. Highlights modified markup, unclosed tags, and changed attributes.
Open ToolMarkdown Diff Checker
Compare markdown text and render the differences visually. View both raw sources and styled diff representations.
Open ToolSQL Diff Checker
Compare SQL queries and database migration scripts. Highlight keyword changes, schema edits, and nested selects.
Open ToolINI Diff Checker
Compare INI configuration blocks side-by-side. Highlights section edits and environment key differences.
Open ToolProperties File Diff Checker
Compare Java properties configurations. Highlight key additions, removals, and value drift.
Open ToolConfiguration File Diff Checker
Compare environment variables, settings parameters, and config files side-by-side.
Open ToolJSON Tools
Prettify, validate, format, minify, and compare JSON structure data.
JSON Formatter
Format, beautify, and clean up minified JSON strings. Customize indentation sizes and view collapsible trees.
Open ToolJSON Validator
Validate your JSON strings against official specs. Highlights precise syntax errors, line numbers, and invalid characters.
Open ToolJSON Minifier
Compress and minify JSON files by stripping all whitespaces, newlines, and tab characters.
Open ToolJSON Beautifier
Format messy JSON strings into beautiful, structured, human-readable layout outputs.
Open ToolJSON Viewer
View nested JSON data as an interactive collapsible node tree. Inspect scopes and copy sub-properties.
Open ToolJSON to CSV Converter
Convert JSON arrays and lists into tabular CSV spreadsheet formats in real-time.
Open ToolCSV to JSON Converter
Convert tabular CSV lines and Excel sheets into structured JSON objects and arrays.
Open ToolXML Tools
Format, validate, parse, and convert XML tags document structures.
XML Formatter
Format raw or minified XML strings with customizable indentation. Converts one-liners into clean tree representations.
Open ToolXML Validator
Validate XML syntax, tags closing order, attributes, namespaces, and locate coding errors in real-time.
Open ToolXML Minifier
Compress XML strings by stripping all whitespaces, newlines, and comments tags.
Open ToolXML to JSON Converter
Convert XML documents into structured JSON objects, mapping tags and attributes.
Open ToolJSON to XML Converter
Convert JSON objects into formatted XML structures, setting roots and element tags.
Open ToolYAML Tools
Format, validate, lint, and convert YAML configurations.
YAML Formatter
Format, beautify, and clean YAML configurations. Configures spaces, adjusts structures, and parses elements.
Open ToolYAML Validator
Validate YAML files. Highlight parser warnings, indent errors, type conflicts, and syntax errors instantly.
Open ToolYAML to JSON Converter
Convert YAML configs and manifests into structured JSON objects in real-time.
Open ToolJSON to YAML Converter
Convert JSON arrays and objects into clean, indented YAML configuration files.
Open ToolText Utilities
Count words, sort lines, convert casing, clean text, and remove duplicate entries in real-time.
Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time. Features real-time keyword density lists.
Open ToolCharacter Counter
Check exact character count limitations. Shows counts with spaces, without spaces, word count, and space percentages.
Open ToolCase Converter
Convert text casing into UPPERCASE, lowercase, Title Case, camelCase, snake_case, PascalCase, and Sentence case.
Open ToolRemove Duplicate Lines
Remove duplicate lines from text list formats. Supports case-sensitivity options, whitespace trimming, and duplicate counts.
Open ToolSort Lines
Sort lines of text alphabetically, numerically, reversely, or by length. Configure case settings and white-space overrides.
Open ToolText Cleaner
Clean up strings. Strip HTML tags, remove emojis, collapse double spaces, purge empty lines, and format symbols.
Open ToolText Formatter
Format raw paragraphs. Trim trailing spaces, set character line wraps, pad line margins, and align blocks.
Open ToolCode Tools
Compare programming code changes side-by-side with syntax highlighting.
Code Diff Checker
Compare source code files side-by-side with syntax highlight support and Myers diff algorithm.
Open ToolJavaScript Diff Checker
Compare JavaScript and TypeScript source files. Highlights variables, syntax blocks, and script changes.
Open ToolPython Diff Checker
Compare Python scripts side-by-side. Highlights indentation blocks, imports, and function shifts.
Open ToolJava Diff Checker
Compare Java classes and packages side-by-side. Highlights method edits, annotations, and parameters.
Open ToolDeveloper Utilities
Format, validate, parse, generate, and convert JSON, XML, YAML, SQL, Regex, hashes, and times.
SQL Formatter
Format SQL queries for PostgreSQL, MySQL, SQL Server, and Oracle. Standardize keyword casing and indentations.
Open ToolRegex Tester
Test regular expressions in real-time. Highlights matched strings, capture groups, and details execution parameters.
Open ToolUUID Generator
Generate Version 1 and Version 4 UUIDs. Supports bulk generation, custom casing, and text separation formats.
Open ToolHash Generator
Generate cryptographic hashes including MD5, SHA-1, SHA-256, and SHA-512 from input text.
Open ToolBase64 Encoder
Encode text strings and data streams into standard Base64 representation in real-time.
Open ToolBase64 Decoder
Decode Base64 strings back into human-readable plain text. Checks encoding validity automatically.
Open ToolURL Encoder
Percent-encode query parameters, special characters, and path variables for safe web delivery.
Open ToolJWT Decoder
Decode JSON Web Tokens (JWT) payload, header, and signature instantly. Inspect token algorithms, claims, and times.
Open ToolTimestamp Converter
Convert human-readable calendar dates and times to Unix epoch timestamps in seconds and milliseconds.
Open ToolUnix Time Converter
Convert Unix epoch timestamps to structured human-readable calendar dates. Provides relative time estimates.
Open Tool