Free Online Tools for Everyone

Format, beautify, validate and minify JSON with instant error checking.

Encode text to Base64 or decode it back — UTF-8 safe, instant.

Convert an image to a Base64 data URL or raw Base64 string — no upload.

Generate cryptographically secure UUID v4 identifiers, in bulk.

Convert Unix timestamps to dates and back, with a live epoch clock.

Percent-encode or decode URLs and query parameters correctly.

Generate MD5, SHA-1 and SHA-256 hashes from any text instantly.

Generate an MD5 hash from text — and understand why MD5 can't really be decrypted.

Generate a SHA-256 hash from any text, or verify text against a known hash.

Live word, character, sentence and reading-time counts as you type.

Test regex patterns with live highlighting and capture groups.

Convert colors between HEX, RGB and HSL with live preview.

Compare two texts and see added/removed lines highlighted.

Text to Morse code and back, live — with audio playback.

Turn plain text into glitchy, corrupted-looking Zalgo text.

Turn text into large block-letter ASCII art banners.

Encode or decode ROT13 text — the same button does both.

Turn text into strikethrough or underlined Unicode text you can paste anywhere.

Flip text upside down using real Unicode lookalike characters.

Convert text into leetspeak (1337) with adjustable substitution level.

Turn text into circled bubble-style letters using real Unicode characters.

Convert lowercase text into small capital Unicode letters.

Check if a password has appeared in a known data breach — without sending the password anywhere.

Generate strong random passwords with custom length and characters.

Create QR codes with live preview and PNG download — no watermark.

A ready-to-print QR code that rickrolls whoever scans it.

Your exact age in years, months, days — plus next-birthday countdown.

Body Mass Index from your height and weight, plotted on a visual scale.

A free 28-question personality test — get your 4-letter type along with a strength percentage for each dimension, right in your browser.

Daily calorie needs (TDEE) from age, height, weight and activity level, with targets for losing, maintaining or gaining weight.

Basal metabolic rate from two standard formulas (Mifflin-St Jeor and Harris-Benedict), side by side.

Body fat percentage from tape measurements using the U.S. Navy method, with your ACE category.

Recommended daily water intake from body weight and activity level, in liters and glasses.

Find the best time to go to bed or wake up based on 90-minute sleep cycles.

Ideal weight range from height and sex, comparing five classic formulas at once.

Count the days until any future date, or the days since a past one.

Average your grades — simple or weighted — and find the final exam score you need.

Sunrise, sunset, solar noon and day length for any date and location.

Estimated due date, current pregnancy week and trimester from your last period.

Ovulation day, fertile window and next period from your cycle dates.

Start and end dates of your next 6 periods, from your cycle history.

X% of a number, what percent X is of Y, and percentage change.

Find the days between two dates, or add/subtract days, weeks, months and years.

Monthly payment and total interest for a fixed-rate loan.

Calculate a tip and split the bill — presets or custom percentage, instant.

Compute your 13th month pay in the Philippines — total basic salary earned this year, divided by 12.

Estimate Bangladesh income tax and net salary from gross annual salary — AY 2026-27 rates, category-based exemptions.

Calculate your end-of-service gratuity in the UAE, Qatar, Kuwait, Bahrain or Oman — pick your country, get the right formula automatically.

Calculate your gratuity in India under the Payment of Gratuity Act formula — enter your salary and years of service, get an instant estimate.

Calculate your statutory redundancy payment in Ireland — 2 weeks per year plus a bonus week, capped at €600/week.

Calculate CPF contributions and take-home pay on Ordinary Wages, with the current $8,000 OW ceiling and age-band rates (2026).

Calculate your statutory retrenchment severance pay in South Africa — 1 week's pay per completed year of service.

Find your zodiac sign, its date range and a short trait from your birth date.

Weighted or unweighted GPA from letter grades — semester and cumulative.

Length, weight, temperature, area, volume and speed conversions.

Inches to centimeters and back — with screen-size charts for phones, laptops and TVs.

Miles to kilometers and back, plus nautical miles and running-distance charts.

Liters to milliliters and back — with a chart of bottles, cartons and kitchen volumes.

Work out fuel used and total cost for any trip from distance, consumption and fuel price.

Calculate the area of rectangles, circles, triangles and trapezoids, in m² or ft².

Calculate the final price, amount saved, or discount rate — including stacked discounts.

Calculate hours worked from clock-in/out times, deduct breaks, and total a week's hours and pay.

Solve A:B = C:X with cross multiplication. Supports direct and inverse proportion.

Compare current time across cities, see time differences, and convert a custom time between time zones.

Calculate running pace, predict a finish time, or find distance covered. Km/mile toggle, common race distances built in.

Find the GCD (greatest common divisor) and LCM (least common multiple) of two or more numbers, with step-by-step working.

Calculate the volume of cylinders, spheres, cubes, boxes and cones, in m³, cm³ or ft³.

Type two names and get a fun, instant love compatibility percentage. For entertainment only.

Daily protein, carb and fat targets in grams, based on your TDEE and your goal — cut, maintain or bulk.

Convert cups, tablespoons and teaspoons to ml or liters, and back — for cooking and baking.

Kilograms to grams and back — with a cooking chart of common recipe weights.

Bytes, KB, MB, GB and TB both ways, in decimal (1000) or binary (1024) base.

Convert text to UPPER, lower, Title, camelCase, snake_case and more.

Random numbers in any range — bulk, unique draws, sorting.

Generate CODE128, EAN-13, UPC-A and CODE39 barcodes with live preview and PNG download.

Shuffle a list fairly or pick N random winners — one item per line.

Compress JPG/PNG/WebP images locally — no upload, no limits.

Convert PNG images to JPG locally, with batch support.

Convert JPG images to lossless PNG locally, batch supported.

Convert WebP images to universally compatible JPG, locally.

Convert iPhone HEIC photos to JPG — private, on your device.

Resize images by pixel width or percent — aspect ratio kept.

Shrink JPG/JPEG files with adjustable quality — no upload.

Compress PNGs via palette quantization — transparency preserved.

Rasterize SVG vectors to PNG/JPG at any resolution, locally.

Turn an SVG into a real favicon.ico plus PNG icons at every standard size.

Shrink animated GIFs: colors, scale, frame-drop — no upload.

Convert a photo or image into shaded ASCII text art.

Convert a photo of a book or textbook page to text — auto-corrects crooked camera angles before recognizing.

Categorized AI prompts for students — one-click copy, ready to use.

Categorized AI prompts for teachers — one-click copy, ready to use.

AI prompts for principals, HR, counselors, compliance, facilities and more — one-click copy.

AI prompts for exam prep, research, career prep and time management — plus academic essays, one-click copy.

Decode a JWT's header and payload, with expiry status — instant, local, free.

Convert a JSON array to CSV — auto headers, proper escaping, copy or download.

Convert Excel files to JSON or CSV, or turn JSON/CSV into a downloadable .xlsx file.

Convert an HTML table to JSON or CSV, or turn JSON/CSV into HTML table markup.

Convert JSON to XML or XML to JSON — nested objects, arrays, and attributes handled.

Convert JSON to YAML or YAML to JSON — for Kubernetes, Docker Compose, CI configs and more.

Turn CSV rows into a single SQL INSERT INTO statement — pick a table name, proper quoting, copy or download.

Convert CSV to XML and XML back to CSV — bidirectional, runs in your browser, no upload.

Exact token count for GPT-4o or GPT-4/3.5 — real tokenizer, not an estimate.

Estimate and compare GPT, Claude, Gemini, DeepSeek, Qwen, Kimi, GLM and Grok API costs from your token counts.

Remove duplicate lines, blank lines and extra spaces — all in one tool.

Convert Simplified/Traditional Chinese with regional standard support.

Chinese to Pinyin, 4 formats, smart multi-reading detection.

Decode a QR code from an uploaded image — local, no app needed.

Generate robots.txt — presets for AI crawlers, custom paths, sitemap.

Convert numeric amounts to Chinese uppercase currency format.

Convert a numeric amount into the words format required on a check.

Drag sliders to round each corner and copy the border-radius CSS.

Adjust sliders for offset, blur, spread and color, then copy the box-shadow CSS.

Shape a custom easing curve with sliders, preview the animation, and copy the cubic-bezier() CSS.

Type your text, pick two glitch colors, and copy the animated CSS + HTML for a color-split glitch effect.

Build a spinning, bouncing or pulsing CSS loading animation and copy the CSS + HTML.

Style a rounded checkmark, toggle switch or filled-circle checkbox and copy the CSS.

Adjust size, colors and rounding, then copy an accessible checkbox-based toggle switch as HTML and CSS.

Pick direction, size and color, then copy a pure CSS triangle built with the border trick.

Adjust background opacity, blur, border and radius to build a frosted-glass card, then copy the CSS.

Pick a pattern (dots, stripes, checkerboard, grid), adjust color and size, then copy the CSS.

Build linear and radial gradients with color stops and an angle slider, then copy the CSS.

Pick a shape preset, preview the clip live, and copy the generated clip-path CSS.

Shrink HTML for production or beautify it for readability — no upload, size savings shown.

Shrink CSS for production or beautify it for readability — no upload, size savings shown.

Shrink JavaScript for production or beautify minified code for readability — no upload, size savings shown.

Convert any text into a clean, URL-safe slug — live preview, no upload.

Generate fake, format-valid IBAN numbers for testing — not real bank accounts.

Create Open Graph and Twitter Card meta tags with a live share-preview.

Browse curated Google Fonts pairings with live previews, filter by mood, copy embed code.

Combine multiple PDFs into one, in any order — no upload.

Combine JPG, PNG or WebP images into one PDF, locally in your browser — reorder pages, no upload.

Extract text from a PDF into an editable Word (.docx) document, locally in your browser — no upload.

Compress a PDF to reduce its file size, locally in your browser — text becomes non-selectable in exchange for a reliably smaller file.

Extract text from a PDF into an Excel (.xlsx) spreadsheet, locally in your browser — best for simple tables and lists.

Extract page ranges from a PDF, or split into single pages — no upload.

Compute and compare MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of the same text side by side.

Design a fake iMessage conversation and export it as a PNG — for mockups and memes only.

Design a fake WhatsApp conversation and export it as a PNG image, entirely in your browser.

Design a fake Instagram DM conversation and export it as a PNG image, entirely in your browser.

Twitter/X Post Generator. Everything is generated locally in your browser using the HTML Canvas API; nothing is ever uploaded to a server.

Facebook Post Generator. Everything is generated locally in your browser using the HTML Canvas API; nothing is ever uploaded to a server.

TikTok Video Generator. Everything is generated locally in your browser using the HTML Canvas API; nothing is ever uploaded to a server.

ChatGPT Conversation Generator. Everything is generated locally in your browser using the HTML Canvas API; nothing is ever uploaded to a server.

Black-box, pixelate or blur faces, ID numbers and license plates in a photo, entirely in your browser.

Explore JSON as a collapsible tree with search, built for large and deeply nested structures.

Final balance and total interest from principal, rate, term and monthly deposits, with a yearly breakdown.

Drag a selection box to crop any image, with free or fixed aspect ratios, and download as PNG or JPG.

Pick any color visually or sample it from an uploaded image, with HEX, RGB and HSL output and copy buttons.

Turn text into cursive, gothic and outline Unicode styles you can paste anywhere.

Generate elf, dwarf, orc and other fantasy names for D&D, games and fiction.

Generate cool, cute or gaming username ideas from your keyword.

Calculate your rising sign (Ascendant) from your birth date, time, and location.

Calculate your moon sign from your birth date and time.