Free online tools that just work!

Test regular expressions with live match highlighting, groups, and replace.

Count words, characters, sentences, and reading time.

Convert text between upper, lower, title, camel, and snake case.

Count characters and stay under tweet, SMS, and meta tag limits — live.

Remove duplicate lines from text while keeping the order.

Strip blank and whitespace-only lines from text.

Sort lines alphabetically, numerically, or in reverse.

Reverse text by characters, words, or lines.

Turn any text into a clean, URL-friendly slug.

Find and replace text, with optional regex support.

Compare two texts and highlight the differences.

Group near-duplicate or similar lines — survey answers, feedback, comments.

Format, validate, and beautify JSON instantly in your browser.

Beautify and indent messy or minified HTML in your browser.

Beautify and tidy messy or minified CSS in your browser.

Beautify and indent minified or messy JavaScript in your browser.

Format and beautify SQL queries with uppercased keywords.

Validate, beautify, and fix the indentation of YAML in your browser.

Beautify and indent XML, and flag mismatched tags — in your browser.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text in your browser.

Encode text to Base64 or decode Base64 back to text.

Percent-encode or decode URLs and query strings.

Encode or decode HTML entities.

Decode and inspect JSON Web Tokens.

Parse a URL query string into readable key–value pairs.

Convert text to and from Unicode escape sequences.

Generate random v4 UUIDs in bulk, ready to copy.

Generate strong, random passwords in your browser.

Generate random numbers within a range.

Generate random strings and tokens.

Generate placeholder Lorem Ipsum text.

Create free QR codes for URLs, text, email, phone, WiFi, and vCards.

Calculate percentages, increases, and decreases.

Work out sale prices and how much you save.

Calculate tips and split the bill.

Calculate body mass index from height and weight.

Estimate monthly loan payments and total interest.

See how savings grow with compound interest.

Add or remove VAT at any rate.

Convert between 130+ units across 16 categories — length, mass, temperature, speed, data size, and more.

Convert between world currencies with daily exchange rates — USD, EUR, GBP, JPY, KRW, and more.

Log fill-ups per vehicle and chart your km/L fuel economy trend by week, month, and year.

Find the best bedtime or wake-up time based on 90-minute sleep cycles.

Save your dogs and cats and watch their age in human years count up live from their birthday.

Set a daily water goal and tap to track your intake with a progress bar — saved on your device.

Estimate your due date and current week, with saved dates and week-by-week tips and cautions.

Log your periods, see your cycle history, and predict your next periods, fertile window, and ovulation.

Convert between Unix timestamps and human-readable dates.

Count the days, weeks, and months between two dates.

Calculate your exact age from a birth date.

Add or subtract days, weeks, or months from a date.

Track multiple saved countdowns and D-Days to any date or event.

Convert times across zones, see a live world clock, and plan meetings.

Find the ISO week number for any date.

Convert colors between HEX, RGB, and HSL.

Check WCAG contrast, build CSS gradients, and generate color palettes.

Resize, crop, rotate, compress, and convert images — in your browser, no upload.

Shrink JPG, PNG, and WebP image file sizes — in your browser, no upload.

Sharpen soft or blurry photos online — adjust strength and download, no upload.

Apply Gaussian blur to a photo — adjust the radius and download, no upload.

Convert color photos to black and white, or partially desaturate — no upload.

Add a warm vintage sepia tone to photos — adjust intensity and download, no upload.

Adjust the brightness and contrast of any photo instantly — no upload.

Shift hue and adjust saturation on any image — live preview, no upload.

Strip GPS location and all EXIF metadata from photos in bulk — no upload.

Add custom text watermarks to photos — choose position, opacity, and color. No upload.

Make any solid background color transparent — click to sample, adjust tolerance, save as PNG. No upload.

Add a solid color frame or border to any photo — pick size and color. No upload.

Cut any image into a grid of equal tiles and download as a ZIP — no upload.

View EXIF data from any photo — camera settings, date, GPS location, and more. No upload.

Make photo collages with grid layouts, frame backgrounds, and text stickers — including 인생네컷 style. No upload.

Convert SVG files to PNG or JPEG — set a custom width for high-res output, no upload.

Click any pixel in a photo to get its exact hex, RGB, and HSL color values. No upload.

Add text, signatures, highlights, and images to a PDF — no upload.

Reduce PDF file size — drop it in, get a smaller file. No upload.

Combine multiple PDFs into one file — in your browser, no upload.

Convert JPG, PNG, and WebP images into a PDF — in your browser, no upload.

Split a PDF into separate files — one per page or in chunks, no upload.

Pick pages from a PDF into a new file — visual page picker, no upload.

Rotate PDF pages — one or all, and save it permanently. No upload.

Convert PDF pages to PNG or JPEG — choose DPI and download individually or as a ZIP. No upload.

Extract the selectable text layer from any PDF and download as a .txt file — no upload.

View, edit, or remove PDF metadata — title, author, keywords, and more. No upload.

Stamp a diagonal text watermark on every PDF page — control opacity, angle, and color. No upload.

Add page numbers to a PDF — pick position, format, and starting number. No upload.

Fill in PDF form fields (text, checkboxes, dropdowns) and download the completed form. No upload.

Generate meta tags, Open Graph, Twitter cards, canonical, robots.txt, and JSON-LD schema — all in one.

Analyze any live web page — its fonts, colors, images, and SVGs. Runs as a bookmarklet on any site.

Online countdown timer and stopwatch with laps — runs in your browser, no install.

Bundle files into a ZIP archive in your browser — no upload, no install.

See your public IPv4 and IPv6 address, ISP, and approximate location — instantly, free.

See exactly what's on your clipboard — text, HTML, and images — before you paste it anywhere.

Scan a QR code with your camera or read one from an image — decode links and text in your browser.

Test every key on your keyboard — see presses light up live and check for stuck or dead keys.

Cycle full-screen solid colors to spot dead, stuck, or hot pixels on any monitor or phone screen.

Measure your screen's frame rate live with a real-time FPS counter and graph — no install.

Test mouse buttons, scroll wheel, and movement — plus a click-speed (CPS) counter. No install.

Test your touchscreen — visualize every touch point and draw to find dead or unresponsive spots.

Test a game controller in your browser — see buttons, triggers, and joystick axes react live.

Test your phone's gyroscope, accelerometer, and orientation sensors with live tilt and motion readouts.

Test your microphone in the browser — live level meter and waveform. Nothing is recorded or uploaded.

Test speakers and headphones — play left, right, and stereo test tones to check each channel.

Test your webcam in the browser — live preview with resolution and frame rate. Nothing is uploaded.

Measure your connection's ping, jitter, and packet loss live — a quick latency test in your browser.

See your battery status, screen resolution, CPU cores, memory, OS, and browser — detected locally.

Full-screen test patterns for your monitor — gradients, banding, sharpness, contrast, and backlight bleed.

Check whether WebRTC exposes your local or public IP addresses — a quick privacy check for VPN users.

Trim, split, merge, crop, and caption video right in your browser — reframe to vertical or square, add transitions, text and music, change speed, no upload and no watermark.