https://devtools.solutions

Developer tools that run in your browser.

No accounts. No backend. Just utility.

Browse by Category

Start with a category hub if you know the workflow, then move into a single-purpose tool page. This structure keeps the site easier to crawl and makes each page more useful for the exact task it solves.

JSON Tools

19 focused pages. Browse JSON formatters, validators, converters, schema builders, and JSON data transformation tools.

Text Tools

30 focused pages. Browse text cleanup, case conversion, comparison, diff, and plain-text conversion tools.

Encoding Tools

13 focused pages. Browse Base64, URL, HTML, Unicode, and escaping tools for common encoding workflows.

Security Tools

18 focused pages. Browse hashing, password, token, JWT, UUID, HMAC, and certificate tools.

Regex Tools

8 focused pages. Browse regex testing, explanation, generation, replacement, and performance tools.

Network Tools

11 focused pages. Browse URL, query, HTTP, DNS, and subnet tools for common networking tasks.

Date and Time Tools

8 focused pages. Browse timestamp, timezone, cron, date-diff, and ISO date conversion tools.

File Conversion Tools

4 focused pages. Browse file conversion, CSV/table, and Base64 file handling tools.

Color Tools

7 focused pages. Browse color conversion, palette generation, and gradient tools.

Log Tools

6 focused pages. Browse log parsing, beautifying, and stack-trace cleanup tools.

Markup Tools

5 focused pages. Browse Markdown, HTML, and markup formatting and conversion tools.

Code Tools

4 focused pages. Browse code formatting, minification, validation, and code conversion tools.

SQL Tools

2 focused pages. Browse SQL formatting, minification, and SQL-focused conversion tools.

XML Tools

6 focused pages. Browse XML formatting, validation, conversion, and XML code generation tools.

YAML Tools

3 focused pages. Browse YAML validation, conversion, and YAML code generation tools.

Generator Tools

8 focused pages. Browse lorem ipsum, fake data, QR code, and random value generators.

All Tools

Every tool on DevTools.Solutions runs in the browser and focuses on one clear purpose: format, convert, validate, parse, generate, or compare developer data without requiring an account or server-side processing.

Analyze Password Strength

Analyze password strength, entropy, and character diversity locally in your browser. No data sent to a server.

ASCII to Text

Convert decimal ASCII code values back to readable text. Browser-based ASCII to text converter.

Base64 Decode

Decode a Base64 string back to plain text using your browser's built-in atob() function. No server required.

Base64 Encode

Encode any text or binary string to Base64 using your browser's built-in btoa() function. No server required.

Binary to Text

Convert binary values back to readable text. Browser-based binary to text converter.

Build Cron Expression

Build a cron expression from human-readable schedule settings and preview the next scheduled run times.

Build Query String

Build a URL query string from key-value pairs with proper URL encoding. Browser-based query builder.

Build Request Code

Generate HTTP request code in fetch, Python, and cURL from a URL and parameters. Browser-based request builder.

Calculate DateTime Difference

Calculate the exact difference between two dates in days, hours, and seconds. Browser-based date diff calculator.

Calculate Relative Time

Calculate human-readable relative time from a date (e.g. '3 days ago', 'in 2 hours').

Check Entropy and Strength

Calculate password bit entropy and strength score based on character set and length. Browser-based tool.

CIDR Calculator

Calculate network address, broadcast, host range, and mask from CIDR notation. Browser-based CIDR calculator.

Clean Stack Trace

Remove noise and vendor frames from a stack trace to focus on your application's code.

Convert Color

Pick a color and instantly convert it to HEX, RGB, and HSL formats in your browser.

Convert cURL Command

Convert cURL commands to JavaScript fetch, Python requests, and C# HttpClient code. Browser-based cURL converter.

Convert Timezone

Convert dates and times between timezones using the Intl.DateTimeFormat API. Browser-based timezone converter.

Convert to camelCase

Convert any text or identifier to camelCase notation — lowercase first word, capitalised subsequent words.

Convert to ISO 8601

Convert a date string or Unix timestamp to ISO 8601 format (e.g. 2024-05-20T17:43:42.000Z).

Convert to kebab-case

Convert any text or identifier to kebab-case notation — all lowercase words joined with hyphens.

Convert to lowercase

Convert all characters in the input text to lowercase using the locale-aware toLowerCase() method.

Convert to PascalCase

Convert any text or identifier to PascalCase notation — all words capitalised with no separator.

Convert to snake_case

Convert any text or identifier to snake_case notation — all lowercase words joined with underscores.

Convert to UPPERCASE

Convert all characters in the input text to uppercase using the locale-aware toUpperCase() method.

Count Characters, Words, Lines

Count characters, words, lines, and bytes in any text. Browser-based string counter.

CSV to JSON

Convert CSV text to a JSON array of objects. Browser-based CSV to JSON converter with no server upload.

CSV to Table

Render a CSV file as an HTML table for easy reading. Browser-based CSV to table viewer.

Date to Unix Timestamp

Convert a human-readable date and time to its Unix timestamp (seconds since 1970-01-01T00:00:00Z).

Debug Regex Matches

Debug regex patterns by inspecting all match groups and capture positions. Browser-based regex debugger.

Decode and Download

Paste a Base64 string or data URL to decode it and download the result as a file. All decoding happens in your browser.

Decode JWT

Decode and inspect JWT tokens to view header and payload claims. Browser-based JWT decoder, no data sent to a server.

Decode SSL Certificate

Decode and inspect PEM-encoded SSL/TLS certificates in your browser. View subject, issuer, and validity dates.

Escape C# String

Escape special characters for use in a C# string literal, including quotes, backslashes, and control characters.

Escape HTML

Escape the five HTML special characters (&, <, >, ", ') so they can safely appear in HTML source code.

Escape JavaScript String

Escape special characters in a JavaScript string literal, including quotes, backslashes, and control characters.

Escape Python String

Escape special characters in a Python string literal, including quotes, backslashes, and newlines.

Escape SQL String

Escape single quotes and other special characters in a SQL string value to prevent SQL injection.

Explain Regex Pattern

Break down a regular expression and explain each part in plain English. Browser-based regex explainer.

File to Base64

Select any file and convert it to a Base64-encoded string or data URL. Runs in your browser.

Flatten JSON

Flatten nested JSON objects to single-level dot-notation keys. Browser-based JSON flatten tool.

Format Code

Format and pretty-print code in JSON, JavaScript, CSS, HTML, and SQL. Browser-based code formatter.

Format Kubernetes Logs

Parse and reformat Kubernetes pod log output. Browser-based Kubernetes log formatter.

Format Markdown Table

Align and format Markdown table columns. Browser-based Markdown table formatter.

Format SQL

Format and indent SQL queries for readability. Supports SELECT, INSERT, UPDATE, DELETE, and more.

Format XML

Pretty-print and indent XML with configurable spacing. Validates structure and highlights parse errors.

Generate API Key

Generate cryptographically random API keys of any length using the Web Crypto API. Keys are generated locally in your browser.

Generate bcrypt

Hash a password using bcrypt with configurable cost factor. Uses bcryptjs running entirely in your browser.

Generate Code from XML

Generate C# classes or other typed data models from an XML sample. Code generation runs in your browser.

Generate Code from YAML

Generate TypeScript interfaces or C# classes from a YAML sample. Runs in your browser using js-yaml.

Generate Color Palette

Generate color palettes from a base color using complementary, analogous, and triadic schemes. Browser-based tool.

Generate CSS Gradient

Generate CSS linear and radial gradients with custom colors and angles. Browser-based gradient generator.

Generate Fake Addresses

Generate fake postal addresses for testing and development. Browser-based fake address generator.

Generate Fake Emails

Generate fake email addresses for testing and development. Browser-based fake email generator.

Generate HMAC

Generate an HMAC signature using SHA-256, SHA-384, or SHA-512 with a secret key. All crypto runs in your browser.

Generate JSON Schema

Infer a JSON Schema from a sample JSON value, including types, required fields, and array item schemas.

Generate JWT

Build and sign a JSON Web Token with a custom header, payload, and secret using HMAC-SHA256. Runs in your browser.

Generate Lorem Ipsum

Generate Lorem Ipsum placeholder text by words, sentences, or paragraphs. Browser-based generator.

Generate Markdown Table

Generate Markdown tables from column headers and row data. Browser-based Markdown table generator.

Generate MD5

Generate an MD5 hash from any input string. Uses the CryptoJS library running entirely in your browser.

Generate Password

Generate strong, cryptographically random passwords with configurable length and character sets. Runs in your browser.

Generate QR Code

Generate a QR code image for any URL or text. The image is generated by the qrserver.com API.

Generate Random GUID List

Generate a list of cryptographically random GUIDs (UUID v4) in bulk. All generation happens in your browser.

Generate Random Names

Generate random first names, last names, and full names. Browser-based name generator.

Generate Random Numbers

Generate random integers within a configurable range. Browser-based random number generator.

Generate Regex Cheat Sheet

Generate a regex syntax cheat sheet with anchors, quantifiers, character classes, and groups.

Generate Regex From Examples

Provide example strings that should match and strings that should not match, and get a generated regex pattern.

Generate Regex Pattern

Describe what you want to match and generate a regular expression pattern. Browser-based regex generator.

Generate Test Data

Generate random test data sets with configurable fields in JSON or CSV. Browser-based test data generator.

Generate Token

Generate cryptographically random tokens of any length. Browser-based token generator using the Web Crypto API.

Generate UUID List

Generate a list of cryptographically random UUID v4 values in bulk. All generation happens in your browser.

Generate UUIDs

Generate one or more cryptographically random UUID v4 values using the Web Crypto API. Runs in your browser.

Generate Word List

Generate a random word list from a seed text. Browser-based word list generator.

Hash Compare

Compare two hash strings for equality, with constant-time comparison to prevent timing side-channels.

Hash Generator

Generate SHA-1, SHA-256, SHA-384, SHA-512, and MD5 hashes for any input string using the Web Crypto API. All hashing runs locally in your browser.

HEX to HSL

Convert HEX color codes to HSL values. Browser-based HEX to HSL converter.

HEX to RGB

Convert HEX color codes to RGB values. Browser-based HEX to RGB converter.

Hex to Text

Convert hexadecimal values back to readable text. Browser-based hex to text converter.

HSL to HEX

Convert HSL color values to a HEX color code. Browser-based HSL to HEX converter.

HTML Decode

Convert HTML entity references like &amp;, <, and > back to their original characters. Runs in your browser.

HTML Encode

Escape HTML special characters (&, <, >, ", ') to their HTML entity equivalents. Runs in your browser.

HTML to Markdown

Convert HTML source to equivalent Markdown syntax. Supports headings, bold, italic, links, and lists.

IP Subnet Calculator

Calculate subnet information from an IP address and subnet mask, including network class, host count, and usable range.

JSON Formatter

Format and pretty-print JSON with configurable indentation. Validates syntax and reports parse errors.

JSON to Code

Generate TypeScript interfaces, C# classes, and Go structs from a JSON sample. All code generation runs in your browser.

JSON to CSV

Convert a JSON array of objects to CSV format, using the object keys as column headers.

JSON to JSONL

Convert a JSON array to JSONL (newline-delimited JSON) format. Browser-based converter.

JSON to Python Dataclass

Convert JSON objects to Python @dataclass definitions with type annotations. Browser-based code generator.

JSON to SQL INSERT

Convert a JSON array to SQL INSERT statements with a custom table name. Browser-based JSON to SQL tool.

JSON to Table View

Render a JSON array as an HTML table for easy reading. Browser-based JSON to table viewer.

JSON to TSV

Convert a JSON array to TSV (tab-separated values) format. Browser-based JSON to TSV converter.

JSON to XML

Convert a JSON object or array to well-formed XML. Runs entirely in your browser.

JSON to YAML

Convert a JSON object or array to YAML format. Runs entirely in your browser.

JSONL to JSON

Convert JSONL (newline-delimited JSON) to a standard JSON array. Browser-based JSONL to JSON converter.

Levenshtein Distance

Calculate the edit distance between two strings — the minimum number of single-character insertions, deletions, or substitutions required to transform one into the other.

Log Beautifier

Reformat and colour-code log output for easier reading. Browser-based log beautifier.

Markdown Preview

Render and preview Markdown as formatted HTML in real time. Browser-based Markdown preview.

Markdown to HTML

Convert Markdown source to raw HTML. Outputs the HTML source code ready to embed.

Minify Code

Remove whitespace from JSON, JavaScript, CSS, and HTML code to produce a compact single-line output. Runs in your browser.

Minify JSON

Remove whitespace from JSON to produce a compact minified string. Browser-based JSON minifier.

Minify SQL

Remove all unnecessary whitespace and comments from SQL to produce a compact single-line query.

Minify XML

Remove all whitespace and newlines from XML to produce a compact single-line string.

Normalize Whitespace

Collapse multiple consecutive whitespace characters into a single space and trim leading/trailing whitespace.

Optimize/Compress JSON

Minify JSON and measure compression savings. Browser-based JSON optimize and compress tool.

Parse Apache Logs

Parse Apache Combined Log Format entries into structured fields. Browser-based Apache log parser.

Parse AWS Logs

Parse AWS CloudWatch and ALB log entries into structured fields. Browser-based AWS log parser.

Parse Cookies

Parse a Cookie header string into individual cookie name-value pairs. Browser-based cookie parser.

Parse HTTP Headers

Parse HTTP request or response headers into name-value pairs. Browser-based headers parser.

Parse Nginx Logs

Parse Nginx access log entries in the default combined log format and display each field.

Parse PEM

Parse PEM-encoded certificates, keys, and CSRs to inspect their structure. Browser-based PEM parser.

Parse Query String

Parse a URL query string into key-value pairs with URL decoding. Browser-based query string parser.

Parse URL

Parse a URL into protocol, host, path, query parameters, and fragment. Browser-based URL parser.

Parse User Agent

Parse a User-Agent string to identify browser, OS, and device type. Browser-based UA parser.

Paste Anything - Convert to Code

Paste any data format and automatically convert it to typed code models. Browser-based format-to-code converter.

Regex Replace Preview

Preview a regex find-and-replace operation on your text before applying it. Browser-based regex replace tool.

Regex Tester

Test regular expressions against any text and see matches highlighted in real time. Browser-based regex tester.

Remove Diacritics

Strip accent marks and diacritical characters from text, converting letters like é, ü, ñ to their plain ASCII equivalents.

Remove Duplicate Lines

Remove all duplicate lines from multi-line text, keeping only the first occurrence of each line. Comparison is case-sensitive and runs in your browser.

Remove Duplicate Words

Remove duplicate words from text, keeping only the first occurrence. Browser-based word deduplicator.

Remove Empty Lines

Delete all blank lines from multi-line text, keeping only lines that contain at least one character.

Remove Punctuation

Strip all punctuation marks from text, leaving only letters, numbers, and spaces.

Reverse String

Reverse the characters in any input string. Runs instantly in your browser.

RGB to HEX

Convert RGB color values to a HEX color code. Browser-based RGB to HEX converter.

ROT13

Apply the ROT13 Caesar cipher substitution to text. ROT13 is its own inverse — apply it twice to decode.

Run Regex Performance Test

Benchmark a regular expression by running it against a large input string and measuring execution time in milliseconds.

Shuffle Lines

Randomly shuffle the order of lines in text using the Fisher-Yates algorithm. Browser-based line shuffler.

Similarity Score

Calculate the similarity percentage between two strings using a Levenshtein-based distance algorithm.

Slugify Text

Convert text to a URL-safe slug by lowercasing, removing special characters, and replacing spaces with hyphens.

Smart Quotes to Normal

Replace curly quotation marks and apostrophes with straight ASCII equivalents. Browser-based smart quotes converter.

Sort JSON Keys

Sort JSON object keys alphabetically at every nesting level. Browser-based JSON key sorter.

Sort Lines

Sort the lines of multi-line text alphabetically. Supports ascending, descending, and case-insensitive sorting.

Strip HTML Tags

Remove all HTML tags from text, leaving only the plain text content. Browser-based HTML tag stripper.

Table to CSV

Extract an HTML table to CSV format. Browser-based table to CSV converter.

Test Cron Expression

Test and validate cron expressions and preview next execution times. Browser-based cron tester.

Text Diff

Compare two blocks of text line-by-line and see additions, removals, and changes. Browser-based text diff tool.

Text to ASCII

Convert text characters to their decimal ASCII code values. Browser-based text to ASCII tool.

Text to Binary

Convert text to space-separated 8-bit binary representations of each character.

Text to Hex

Convert text characters to hexadecimal code values. Browser-based text to hex tool.

Trim Lines

Remove leading and trailing whitespace from every line of text. Browser-based line trimmer.

TSV to JSON

Convert a tab-separated values (TSV) file to a JSON array, using the first row as object keys.

Unicode Escape

Escape Unicode characters to \uXXXX sequences for use in source code. Browser-based Unicode escape tool.

Unicode Unescape

Convert \uXXXX Unicode escape sequences back to readable characters. Browser-based Unicode unescape tool.

Unix to Date

Convert a Unix timestamp (seconds or milliseconds) to a human-readable date and time, or convert a date back to a Unix timestamp.

URL Decode

Decode a percent-encoded URL string back to readable text using JavaScript's decodeURIComponent.

URL Encode

Percent-encode a string for safe use in URLs using JavaScript's encodeURIComponent. Runs in your browser.

Validate JSON

Validate JSON syntax and report parse errors. Checks structure and data types in your browser.

Validate TOML

Validate TOML syntax and report parse errors using a JavaScript TOML parser running in your browser.

Validate XML

Validate XML syntax and check for well-formedness errors using the browser's built-in XML parser.

Validate YAML

Validate YAML syntax and report parse errors. Uses the js-yaml library running in your browser.

Verify JWT Signature

Verify a JWT's HMAC-SHA256 signature using your secret key. All cryptography runs in your browser.

View DNS Records

Look up DNS records for any domain by querying the Google DNS API. Results include A, AAAA, MX, TXT, and CNAME records.

XML to CSV

Convert a repeating XML element list to CSV format with column headers from element names.

XML to JSON

Convert an XML document to a JSON representation. Attributes, text, and child elements are all preserved.

YAML to JSON

Convert YAML to a formatted JSON object. Uses js-yaml running entirely in your browser.

Developer Tools FAQ

Are these developer tools free to use?

Yes. All tools on DevTools.Solutions are free and run directly in your browser.

Do I need to create an account?

No account is required. Open any tool page and start using it immediately.

Is my data uploaded to a server?

No. Tool processing is client-side and does not require a backend.