All Free Online Tools

JSON, encoders, generators and formatters for developers.

Base64 Encode / Decode

Free Base64 encoder and decoder. Convert text or files to Base64 and back instantly in your browser — Unicode-safe, with URL-safe and data-URI options.

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Color Converter

Free color converter. Convert colours between HEX, RGB, HSL and CMYK with a live preview swatch and one-click copy — instantly and privately in your browser.

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Cron Expression Explainer

Free cron expression explainer. Paste a cron string and get a plain-English description of when it runs, with a per-field breakdown — supports ranges, steps, lists and macros.

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Cron Expression Generator

Free cron expression generator. Build a valid cron schedule from simple dropdowns and presets, with a plain-English description of when it runs — copy and paste in seconds.

CSV to JSON Converter

Free online CSV to JSON converter. Turn spreadsheet or database CSV exports into a clean JSON array of objects instantly in your browser, with full quoted-field support.

Hash Generator

Free hash generator. Create MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text instantly in your browser, with one-click copy. Nothing is uploaded.

HTML Entity Encode / Decode

Free HTML entity encoder and decoder. Escape special characters and non-ASCII text to HTML entities and decode them back — instantly and privately in your browser.

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JSON Formatter & Validator

Free online JSON formatter, validator and beautifier. Pretty-print, minify, sort and validate JSON instantly in your browser.

JSON to CSV Converter

Free online JSON to CSV converter. Turn a JSON array of objects into clean, Excel-ready CSV instantly in your browser, with a live table preview.

JSON to XML Converter

Free JSON to XML converter — and XML to JSON too. Convert between JSON and XML instantly in your browser, with attributes, arrays and nested data handled cleanly.

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JWT Decoder

Free JWT decoder. Paste a JSON Web Token to decode and inspect its header and payload, view standard claims and check expiry — all in your browser, nothing uploaded.

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Lorem Ipsum Generator

Free Lorem Ipsum generator. Create placeholder text in paragraphs, sentences, words or list items, with a one-click copy — perfect for mockups and designs.

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Regex Tester

Free online regex tester. Test regular expressions against your text with live match highlighting, capture groups and flags — instantly and privately in your browser.

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URL Encode / Decode

Free online URL encoder and decoder. Percent-encode text for safe use in URLs and decode %-encoded strings back to readable text — instantly and privately in your browser.

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UUID Generator

Free UUID generator. Create cryptographically-random version 4 UUIDs in bulk with options for uppercase, no hyphens and braces — copy or download. Generated in your browser.

Counters, SERP previews, schema and content tools.

Case Converter

Free online case converter. Instantly change text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more — all shown at once, copy any with one click.

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FAQ Schema Generator

Free FAQ schema generator. Build valid FAQPage JSON-LD structured data for rich results in seconds — add your questions and answers and copy the ready-to-paste snippet.

Find and Replace Text

Free find and replace text tool. Replace words or patterns in bulk text with case-insensitive, whole-word and regex options, and see the replacement count — in your browser.

Hashtag Generator

Free hashtag generator. Turn keywords or a topic into relevant hashtags for Instagram, TikTok, X and LinkedIn, with copy-all — generated instantly in your browser.

Headline Analyzer

Free headline analyzer. Score your blog title for length, power and emotional words, and structure, with actionable tips to make it more clickable — in your browser.

Meta Tag Generator

Free meta tag generator. Build SEO meta tags — title, description, robots, viewport plus Open Graph and Twitter cards — and copy the ready-to-paste code.

Open Graph Preview

Free Open Graph preview and meta tag generator. See how your link looks when shared on Facebook, X and LinkedIn, and copy ready-to-paste og: and twitter: meta tags.

Reading Time Calculator

Free reading time calculator. Paste any text to see estimated reading and speaking time plus word, character and sentence counts — live and private in your browser.

Remove Duplicate Lines

Free tool to remove duplicate lines from a list. Dedupe, trim, sort and clean any list with case-insensitive and blank-line options — instantly and privately in your browser.

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Robots Meta Tag Generator

Free robots meta tag generator. Build a valid robots meta tag with noindex, nofollow, max-snippet and other directives, with a plain-English explanation and copy.

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SERP Snippet Preview

Free SERP snippet preview tool. See how your title and meta description will look in Google search, with pixel-accurate length checks and a mobile preview.

Slug Generator

Free URL slug generator. Turn any title into a clean, SEO-friendly URL slug with options for separators, accents and stop-words — single or bulk, in your browser.

Text Repeater

Free text repeater. Repeat any text or word multiple times with your choice of separator and optional numbering — copy the result in one click, in your browser.

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UTM Link Builder

Free UTM link builder. Create tagged Google Analytics campaign URLs with utm_source, utm_medium and utm_campaign — properly encoded, in your browser.

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Word Counter & Keyword Density Checker

Free word counter and keyword density checker. Count words, characters, sentences, paragraphs and reading time, and see your most-used keywords and phrases — live, in your browser.

EMI, SIP, GST, income tax and salary calculators.

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CAGR Calculator

Free CAGR calculator. Find the compound annual growth rate of an investment from its start value, end value and duration, with total gain — instantly and accurately.

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Compound Interest Calculator

Free compound interest calculator. See how your money grows with interest on interest — total amount, interest earned and a year-by-year breakdown for any frequency.

Discount Calculator

Free discount calculator. Find the final price and amount saved for any discount percentage or flat amount, with optional tax — instantly in your browser.

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EMI Calculator

Free EMI calculator for home, car and personal loans. Get your monthly EMI, total interest and a year-by-year amortization schedule instantly — with rupee formatting.

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FD Calculator

Free FD calculator. Work out your fixed deposit maturity amount and interest earned for any rate, tenure and compounding frequency — instantly and accurately.

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Gratuity Calculator

Free gratuity calculator. Estimate the gratuity payable on your last drawn salary and years of service under the Payment of Gratuity Act — with the formula shown.

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GST Calculator

Free GST calculator to add or remove GST. Get the base amount, GST and total with CGST, SGST and IGST split for any rate (5%, 12%, 18%, 28% or custom).

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HRA Exemption Calculator

Free HRA exemption calculator. Find your House Rent Allowance tax exemption under Section 10(13A) from your salary, HRA, rent and city — with the full breakdown.

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Lumpsum Calculator

Free lumpsum calculator for mutual funds and investments. See the future value, total invested and estimated returns of a one-time investment, with a year-by-year breakdown.

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PPF Calculator

Free PPF calculator. Work out your Public Provident Fund maturity value, total investment and interest earned with a year-by-year table at the current PPF rate.

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RD Calculator

Free RD calculator. Find the maturity amount and interest on a recurring deposit for any monthly deposit, interest rate and tenure — instantly and accurately.

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Rupees in Words Converter

Free rupees in words converter. Turn any amount into words using the Indian system (lakh, crore) for cheques and invoices, with paise — instantly in your browser.

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Salary Hike Calculator

Free salary hike calculator. Find your new salary after a percentage increment, or work out the hike percentage between your old and new salary — instantly.

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Simple Interest Calculator

Free simple interest calculator. Work out simple interest and the total amount for any principal, rate and time — instantly, with rupee formatting, in your browser.

SIP Calculator

Free SIP calculator for mutual funds. See your invested amount, estimated returns and total maturity value with a year-by-year growth chart — instantly, in your browser.

Compress, resize, convert and edit images in-browser.

Everyday converters, calculators and handy utilities.