DevToolbox

7 tools for encoding workflows.

• Base64 Encode Decode Encode text to Base64 or decode Base64 back to UTF-8 text. Handles multi-byte characters and the URL-safe variant.
• URL Encode Decode Convert spaces, non-ASCII characters, and reserved symbols to percent-encoding, or decode them back to readable text.
• HTML Entity Converter Escape HTML special characters into entities or convert entities back to their original characters.
• Decode Detector Guess whether an unknown string looks like Base64, percent-encoding, a hash, a JWT, hex, or HTML entities.
• JWT Encode Decode Decode the header and payload of a JSON Web Token to inspect claims, or build an HMAC-signed test token in the browser.
• Base32 Encode Decode Encode text to RFC 4648 Base32 or decode Base32 back to readable text.
• ROT13 / Caesar Cipher Shift letters by a fixed number of positions. ROT13 is its own inverse, so applying it twice restores the text.

5 tools for hashing workflows.

• MD5 Hash Compute the 32-character hexadecimal MD5 digest of a string. Suitable for checksums, not for security.
• SHA Hash Compute SHA-1, SHA-256, SHA-384, and SHA-512 digests for the same input at once, in the browser.
• HMAC Generator Produce HMAC-SHA256, SHA-512, SHA-1, or MD5 signatures from a secret key and a message, for webhook and API verification.
• CRC32 Checksum Compute the CRC-32 checksum of text in hex and decimal, for corruption checks and duplicate detection.
• File Hash Calculator Compute MD5, SHA-1, and SHA-256 for a local file entirely in the browser. The file is never uploaded.

6 tools for format workflows.

• JSON Formatter Format JSON with indentation, minify it to a single line, and locate syntax errors.
• XML Formatter Pretty-print or minify XML documents and check whether they are well-formed.
• SQL Formatter Add line breaks and indentation to a SQL query so SELECT, JOIN, and WHERE clauses become readable.
• YAML JSON Converter Convert YAML configuration to JSON and JSON back to YAML, with adjustable indentation.
• CSS Formatter and Minifier Beautify CSS with indentation, or minify it by stripping comments and unnecessary whitespace.
• HTML Formatter and Minifier Indent HTML according to block structure or minify it, leaving pre and script content untouched.

9 tools for convert workflows.

• PHP Serialize Converter Convert between JSON and the PHP serialize() format to inspect values stored in sessions or database columns.
• Unix Timestamp Converter Convert between Unix timestamps in seconds or milliseconds and human-readable dates, with time zone comparison.
• Cron Expression Parser Interpret a five-field cron expression, explain each field, and preview upcoming run times.
• Data Size Converter Convert between bytes, KB, MB, GB, and TB, and compare the 1024-based and 1000-based conventions.
• Query String JSON Converter Convert URL query strings into JSON objects and JSON objects back into query strings.
• CSV JSON Converter Convert CSV with a header row into a JSON array of objects, and JSON arrays back into CSV.
• Number Base Converter Convert numbers between binary, octal, decimal, hexadecimal, and any base from 2 to 36.
• Timezone Converter See a single moment across major time zones, with UTC offsets and the matching Unix timestamp.
• Roman Numeral Converter Convert Arabic numbers to Roman numerals and back, for values from 1 to 3999.

15 tools for string workflows.

• Case Converter Convert text between camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE at once.
• String Inspector Analyse a string for character count, byte length, lines, word count, and character class breakdown.
• Character Counter Count characters with and without spaces, plus words, lines, and bytes, updated as you type.
• Text and IP Sorter Sort lines alphabetically, numerically, or by IPv4 address, with optional duplicate removal.
• Special Characters and Symbols A collection of frequently used Unicode symbols. Click any character to copy it to the clipboard.
• UUID Generator Generate UUID v4 identifiers in bulk using the browser cryptographic random number generator.
• Password Generator Generate strong random passwords in the browser with configurable length and character sets.
• Regex Tester Run a regular expression against sample text and inspect matches, counts, and capture groups.
• Diff Checker Compare two blocks of text line by line and highlight added and removed lines.
• Color Converter Convert colors between HEX, RGB, and HSL notation with a live preview swatch.
• URL Slug Generator Turn titles into URL slugs, with options for separator, letter case, and non-ASCII characters.
• Duplicate Line Remover Remove duplicate lines, keeping the first or last occurrence, or list only unique or only repeated lines.
• Whitespace and Line Cleaner Trim line ends, collapse repeated spaces, drop blank lines, convert tabs, and join lines, in any combination.
• Word Frequency Counter Count how often each word or character appears in a text, sorted from most to least frequent.
• Nano ID and ULID Generator Generate short Nano ID strings or time-sortable ULID identifiers in the browser.

10 tools for web workflows.

• Domain Punycode Converter Convert internationalised domain names to Punycode (xn--) form and back.
• User Agent Parser Inspect the current browser User-Agent string, or paste any UA to extract browser, OS, and device details.
• HTTP Status Codes Look up HTTP status codes, their classes, and the usual causes behind the errors you meet most often.
• MIME Type Lookup Find the MIME type for a file extension, or the extensions associated with a MIME type.
• CIDR Subnet Calculator Work out network address, broadcast, host range, and usable host count from a CIDR block.
• URL Parser Break a URL into protocol, host, port, path, query parameters, and fragment.
• Meta and Open Graph Tag Generator Generate title, description, Open Graph, and Twitter card tags, with warnings when values run long.
• robots.txt Generator Build a robots.txt from allow and disallow rules, crawl-delay, and a sitemap reference.
• .gitignore Generator Combine language, framework, operating system, and editor presets into a single .gitignore file.
• Markdown Table Generator Turn tab or comma separated data into an aligned Markdown table.

6 tools for dummy workflows.

• Dummy Image Generator Create a PNG placeholder image with the size, background color, and label you specify, and download it.
• Dummy PDF Generator Generate a simple placeholder PDF with the number of pages you specify.
• Dummy Text Generator Generate lorem ipsum placeholder text by paragraphs, sentences, or words.
• Fake JSON Data Generator Describe fields and types, then generate as many mock rows as you need in JSON, NDJSON, or CSV.
• Random Number Generator Generate random integers within a range, with options for duplicates, sorting, and separator.
• Dice Roller and Coin Flip Roll dice of any common size or flip coins, with a running distribution of results.

4 tools for image workflows.

• Image to Base64 Converter Convert an image into a Base64 data URI, or preview and save a Base64 string as an image.
• Image Resizer Resize images in the browser and save as PNG, JPEG, or WebP, with aspect ratio locking.
• Image Format Converter Convert between PNG, JPEG, and WebP with a quality slider and a before and after size comparison.
• Favicon Generator Produce the full set of favicon sizes from one image, along with the HTML snippet.