Free Developer & Text Tools
Formatters, encoders, generators and parsers — all running entirely in your browser, so nothing you paste ever leaves your machine.
- 83 free tools
- No signup
- No card
- Runs in your browser
A 1 tool
B 6 tools
Barcode Generator
Create a real, scannable Code 128 barcode from text or numbers with instant PNG download.
Base64 Encode Decode
Encode text to Base64 or decode Base64 to text instantly, with UTF-8 and URL-safe support.
Base64 Encoder & Decoder
Encode text to Base64 or decode it back instantly, with full Unicode support.
Binary to Text
Convert space-separated 8-bit binary code into readable UTF-8 text instantly.
Border Radius Generator
Drag four corner sliders, preview instantly, and copy ready-to-use CSS border-radius code.
Box Shadow Generator
Design a CSS box-shadow visually with offset, blur, spread, color and inset controls, plus copy-ready CSS.
C 19 tools
Character Counter
Count characters, sentences, bytes and check limits for Twitter, SMS and meta tags.
Checksum Comparator
Compare two checksums or compute one from text and get a clear verdict.
CIDR Range Merger
Collapse a messy list of IPv4 CIDR blocks into the smallest exact set that covers the same addresses.
Color Contrast Checker
Check any two colors against WCAG AA/AAA contrast standards with a live text preview.
Color Palette Generator
Generate complementary, triadic and analogous harmonies plus tints and shades.
Color Picker
Pick any color and copy its HEX, RGB and HSL codes instantly, in one click.
CRC32 Hash Generator
Compute the standard IEEE CRC32 checksum of any text in hex and decimal, instantly in your browser.
Cron Expression Generator
Build a cron expression from presets or paste one in for a plain-English explanation.
Cron Next Run Calculator
Parse a five-field cron expression and see exactly when it fires next, ten times over.
CSS Animation Generator
Build a CSS keyframe animation with timing controls and a live preview.
CSS Clamp Generator
Generate a fluid clamp() value for responsive font-size and spacing, with live preview at real viewport widths.
CSS Flexbox Generator
Set direction, justify, align, wrap and gap visually, preview live, and copy flexbox CSS.
CSS Gradient Generator
Build linear, radial or conic CSS gradients visually with a live preview and copy-ready CSS.
CSS Grid Generator
Set columns, rows and gap (or pick a preset), preview live, and copy display:grid CSS.
CSS Minifier
Minify CSS to shrink file size and speed up your site, safely in your browser.
CSS Specificity Calculator
Paste a CSS selector to get its specificity score, or compare two selectors to see which one wins.
CSS Triangle Generator
Generate border-trick triangle and arrow CSS in any direction with a preview.
CSV to JSON Converter
Convert CSV to a clean JSON array with real quote-aware parsing and delimiter choice.
cURL to Fetch Converter
Turn any curl command into working fetch() code with headers, body and auth handled.
D 1 tool
E 1 tool
H 9 tools
HAR File Analyzer
Read a HAR capture in your browser and see request counts, transfer size and blocking time.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text instantly in your browser.
Hex to RGB Converter
Convert any HEX color code to RGB, RGBA and HSL instantly with a live swatch and one-click copy.
Hreflang Tag Generator
Build an hreflang set with validated language and country codes, x-default and return links.
HTML Encoder Decoder
Convert special characters to HTML entities or decode entities back to text, for safe markup.
HTML Minifier
Strip comments and collapse whitespace in your HTML instantly, right in your browser.
HTML to Markdown Converter
Paste HTML and get clean Markdown instantly — headings, lists, links, code blocks, and more.
Htpasswd Generator
Create an Apache htpasswd line with salted APR1 MD5 hashing in your browser.
HTTP Status Code Lookup
Search every HTTP status code with its meaning and SEO guidance on redirects, 404 vs 410, and maintenance mode.
I 2 tools
J 8 tools
JS Minifier
Strip comments and excess whitespace from JavaScript safely, right in your browser.
JSON Diff Viewer
Compare two JSON documents by key path so reordered keys stop showing as false changes.
JSON Formatter & Validator
Format, validate, beautify and minify JSON instantly in your browser.
JSON to CSV Converter
Convert a JSON array of objects into clean, RFC 4180 CSV — nested objects flatten automatically.
JSON to XML Converter
Convert JSON into clean, pretty-printed XML with arrays mapped to repeated elements.
JSON to YAML
Convert JSON into clean, readable YAML instantly in your browser.
JSON Validator
Validate JSON instantly and get the exact error, line, and column when it's invalid.
JWT Decoder
Decode a JWT's header and payload into readable JSON and check its expiry status instantly.
L 1 tool
M 3 tools
Markdown to HTML Converter
Convert Markdown to clean, safe HTML instantly in your browser — no upload, no libraries.
MIME Type Lookup
Search 150+ file extensions and MIME types in either direction, across images, video, audio, docs, archives, code, and fonts.
Morse Code Translator
Convert text to Morse code or Morse code to text instantly, with audio playback of the dot-dash timing.
O 1 tool
P 1 tool
Q 1 tool
R 5 tools
Regex Tester
Test regex patterns live with instant match highlighting, capture groups, and flags.
Remove Duplicate Lines
Paste a list and instantly remove duplicate lines with case-sensitivity, trimming, and sort options.
Remove Line Breaks
Join text broken by line breaks into clean paragraphs, with paragraph-preservation and spacing options.
RGB to Hex Converter
Convert RGB or RGBA values to a hex color code instantly with sliders, live swatch and one-click copy.
ROT13 Encoder & Decoder
Encode or decode ROT13 text instantly, or use the ROT-N slider for any Caesar cipher shift.
S 6 tools
Semantic Version Comparator
Compare two semver strings and see which is newer and exactly why.
Sitemap Validator
Check an XML sitemap for well-formedness, required elements, size limits and bad URLs.
Sort Text Lines
Sort any list of lines alphabetically, numerically, by length, or in reverse — instantly, in your browser.
SQL Formatter
Tokenize and pretty-print SQL queries with clause indentation, keyword casing, and smart comma handling.
String to Slug Converter
Turn any text into a clean, lowercase, hyphenated URL slug with accent stripping.
SVG Path Generator
Assemble move, line, curve and arc commands into a valid SVG path.
T 6 tools
Tailwind Class Converter
Convert Tailwind utility classes to plain CSS, and plain CSS back into utility classes.
Text Case Converter
Change text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.
Text Diff Checker
Compare two texts and see added, removed, and unchanged lines highlighted instantly.
Text to Binary
Convert any text into space-separated 8-bit UTF-8 binary code, instantly in your browser.
Text to Speech
Type or paste text and hear it read aloud with adjustable voice, rate, pitch, and volume.
Title Case Converter
Convert text to correct Title Case with smart minor-word handling, plus UPPERCASE, lowercase, and Sentence case.
U 6 tools
Unicode Character Converter
Break down text into Unicode code points, decimal, hex, HTML entities, and JS escapes, or convert back.
Unit Converter
Free unit converter: cm to inches, kg to lbs, Celsius to Fahrenheit & more.
URL Encoder Decoder
Encode or decode any text or URL to and from percent-encoding, with whole-URL vs component modes.
URL Parser
Break any URL into scheme, host, port, path, query parameters and fragment.
User-Agent Parser
Parse any User-Agent string into browser, version, OS, device type, and rendering engine, free and instant.
UUID Generator
Generate up to 100 random version-4 UUIDs at once, ready to copy into your code or database.
V 1 tool
W 2 tools
X 2 tools
Y 1 tool
No developer & text tool matches that. Search all 822 free tools.
Everything stays in the browser
This matters more than it sounds. Developers routinely paste JWTs, .env contents, HAR files and API responses into online tools, and those payloads frequently contain live credentials. Every tool in this set is plain client-side JavaScript with no network calls, no analytics on the input, and nothing sent to a server — because the safe version of these utilities is the one that physically cannot transmit what you paste.
Correctness on the edge cases
The subnet calculator is right for /31 and /32, where RFC 3021 changes the usable-host count that most calculators get wrong. The semantic-version comparator reproduces the specification's pre-release precedence rules rather than comparing strings. The cron parser applies the day-of-month and day-of-week OR rule, which is the single most misread behaviour in scheduling and the reason a job you expected to run once a year runs sixty times.
Honest about what cannot round-trip
Some conversions are lossy by nature. The Tailwind converter reports what it cannot represent instead of emitting plausible-looking wrong output, and the checksum tools tell you when the browser cannot provide a secure context rather than silently degrading.
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All 822 free tools are organised into 15 categories.
