CyberCodeFree online developer tools
Every tool runs entirely in your browser — nothing is uploaded, nothing is stored. Pick a category to get started.
Free online tools for web developers — formatters, converters and text utilities that run entirely in your browser.
JSON Formatter & Validator
Format, beautify and validate JSON instantly.
Word Counter
Count words, characters, sentences and reading time.
Case Converter
Convert text between UPPER, lower, Title, camelCase & more.
Base64 Encoder / Decoder
Encode and decode Base64 strings instantly in your browser.
URL Encoder / Decoder
Encode and decode URLs and query strings instantly.
Password Generator
Generate strong, random passwords with custom rules.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back.
Color Code Converter
Convert colors between HEX, RGB, HSL and more.
Markdown Preview & Editor
Write Markdown and see a live rendered preview side by side.
CSV to JSON Converter
Convert CSV data to a JSON array instantly.
JSON to CSV Converter
Convert a JSON array to a downloadable CSV file.
Free online image tools — convert, resize, compress and encode images entirely in your browser. No uploads, no servers, 100% private.
Image Format Converter
Convert images between PNG, JPG, WebP and BMP formats.
Image Resizer
Resize images to exact dimensions in your browser.
Image Compressor
Compress images and reduce file size without losing quality.
Image to Base64 Converter
Convert any image to a Base64 data URI for use in CSS or HTML.
Free defensive security utilities — password strength checking, hashing and more.
Free online text utilities — sort, clean, deduplicate, compare and transform text instantly in your browser. No uploads, no signup.
Remove Duplicate Lines
Delete duplicate lines from any list or text instantly.
Remove Empty Lines
Strip blank and whitespace-only lines from text.
Remove Extra Spaces
Collapse multiple spaces and trim messy whitespace.
Text Sorter (Sort Lines)
Sort lines alphabetically or numerically, A–Z or Z–A.
Text Reverser
Reverse characters, words or lines of any text.
URL Slug Generator
Turn any title into a clean, SEO-friendly URL slug.
Find and Replace Text
Find and replace text with plain or regex matching.
Text Difference Checker
Compare two texts and highlight added & removed lines.
Free online encoding and decoding tools — binary, hex, Morse code, ASCII and more. All conversions run 100% in your browser.
Text to Binary Converter
Convert any text into 8-bit binary code.
Binary to Text Converter
Decode 8-bit binary back into readable text.
Text to Hex Converter
Convert text to hexadecimal byte values.
Hex to Text Converter
Decode hexadecimal bytes back into readable text.
Morse Code Translator
Translate text to Morse code and Morse back to text.
ASCII Converter
Convert text to ASCII / Unicode codes and back.
Free developer utilities — hash generators (MD5, SHA-1, SHA-256, SHA-512), HMAC, UUIDs and cryptographically secure random generators.
MD5 Hash Generator
Generate the MD5 checksum of any text instantly.
SHA-1 Hash Generator
Generate the SHA-1 hash of any text instantly.
SHA-256 Hash Generator
Generate the SHA-256 hash of any text instantly.
SHA-512 Hash Generator
Generate the SHA-512 hash of any text instantly.
HMAC Generator
Generate HMAC-SHA256 / SHA512 signatures with a secret key.
UUID Generator (v4)
Generate cryptographically random UUID v4 identifiers in bulk.
Random String Generator
Generate secure random strings with custom character sets.
Random Number Generator
Generate random numbers in any range, with or without repeats.
Random Color Generator
Generate random HEX colors with instant preview swatches.
Free online calculators — percentage, discount, BMI, loan/EMI, GPA and binary calculators. Instant results, 100% in your browser.
Percentage Calculator
Calculate X% of Y, percentage of a total, and % change.
Discount Calculator
Find the final price and savings after any discount.
BMI Calculator
Calculate your Body Mass Index in metric or imperial units.
Loan Calculator
Calculate monthly payments and total interest on any loan.
EMI Calculator
Calculate your Equated Monthly Instalment for any loan.
GPA Calculator
Calculate your GPA on the 4.0 scale from grades and credits.
Binary Calculator
Add, subtract, multiply and divide binary numbers.
Free date and time tools — age calculator, days between dates, countdown timer, time zone converter, working days and leap year checker.
Age Calculator
Calculate exact age in years, months and days.
Days Between Dates Calculator
Count the days, weeks and months between two dates.
Countdown Timer
Live countdown to any date and time you choose.
Time Zone Converter
Convert any date & time between world time zones.
Working Days Calculator
Count business days (Mon–Fri) between two dates.
Leap Year Checker
Check if any year is a leap year instantly.
Free network and domain tools — DNS lookup, MX and TXT records, IP address lookup and WHOIS domain information via encrypted public APIs.
DNS Lookup
Look up A, AAAA, MX, TXT, NS, CNAME and more DNS records.
MX Record Lookup
Check the mail server (MX) records of any domain.
TXT Record Lookup
View TXT records — SPF, DKIM, DMARC and verifications.
IP Address Lookup
Find the location, ISP and ASN of any IP — or your own.
WHOIS Domain Lookup
Check domain registration, expiry date and registrar.
Free SEO tools — meta tag, Open Graph and schema markup generators, robots.txt builder, Google snippet preview and keyword density checker.
Meta Tag Generator
Generate SEO meta tags with live character counters.
Open Graph Tag Generator
Generate Open Graph tags for Facebook, LinkedIn & WhatsApp.
Twitter Card Generator
Generate Twitter/X card meta tags for rich link previews.
Robots.txt Generator
Build a correct robots.txt file in seconds.
Schema Markup Generator (JSON-LD)
Generate Article, FAQ, Organization & Product JSON-LD.
Google SERP Snippet Preview
Preview how your page looks in Google search results.
Keyword Density Checker
Analyse keyword frequency and density in your content.