All tools,in one place.

Simulate investments with compound interest and monthly contributions.

Calculate loan installments using the Price system (fixed payment) or SAC (constant amortization).

Calculate percentage, discount, markup and percentage change between values.

Convert between USD, EUR, GBP, BRL and 150+ currencies in real time.

Convert BTC, ETH, SOL and 15 other cryptos to USD, EUR and BRL in real time.

Convert meters, kilometers, miles, feet and other distance units.

Convert kilograms, grams, pounds, ounces and other mass units.

Convert liters, gallons, cups, tablespoons. Includes cooking units.

Convert square meters, hectares, acres and other area units.

Convert between Celsius, Fahrenheit and Kelvin.

Convert km/h, m/s, mph, knots and other speed units.

Create strong passwords with letters, numbers and symbols, generated locally in your browser.

Create QR codes for URLs, text, WhatsApp, email, all in the browser with no data sent.

Convert any image into ICO/PNG favicons at standard sizes (16x16, 32x32, 180x180).

Create a wa.me link to start a conversation with a pre-filled message.

Draw random numbers, shuffle lists, flip a coin and roll a 6-sided die.

Create short custom links with click statistics. Login required.

Counts words, characters, paragraphs and estimated reading time.

Stopwatch with hundredth-of-a-second precision and lap tracking.

Timer with sound alarm and notification. Includes Pomodoro presets.

Counts the time remaining until a future date and time: Christmas, New Year, birthdays, events.

See the exact time in cities around the world simultaneously. Automatic daylight saving.

Count business days between dates or add business-day deadlines, accounting for public holidays.

Set an alarm for a specific time with sound and browser notification.

See the current time in any city in the world and calculate time zone differences.

Reduce JPG, PNG and WebP photo size without uploading to a server. Runs in a local Web Worker.

Create memes from popular templates or your own image. Text with outline and free positioning.

Adjust brightness, contrast, saturation and apply filters to photos. Simple browser interface.

Change photo dimensions in pixels, percentage or longest side. Preserves aspect ratio.

Crop images in free form, square, landscape or portrait. Pixel-level adjustments.

Rotate photos by 90, 180, 270 degrees or custom angles. Flip horizontally or vertically.

Convert images between JPG, PNG and WebP in your browser, no upload required.

Convert PNG, WebP, BMP, GIF or HEIC to JPG. 100% in the browser, no upload.

Convert JPG to PNG (lossless) or WebP (web compression). Local processing.

Convert HTML/code to PNG or JPG. Useful for generating social cards and previews.

Apply a text or image (logo) watermark to one or many photos. Customizable position.

Combine several PDFs into a single file, right in your browser. No server upload.

Split a PDF into multiple parts by page range or by individual page.

Create a new PDF containing only specific pages. Accepts lists and ranges (1,3,5-10).

Delete specific pages from a PDF. Accepts lists and ranges (e.g. 1,3,5-10).

Reorder, duplicate or remove PDF pages with a drag-and-drop interface.

Use your phone camera or webcam to digitize documents and generate a PDF with perspective correction.

Reduce PDF file size while controlling embedded image quality. 100% local.

Convert one or multiple JPG/PNG images into a single PDF. Choose A4 or image size.

Convert each page of a PDF into a high-quality JPG image. Download as ZIP.

Extract all text from a PDF (no OCR). Ideal for digitally generated PDFs.

Rotate specific pages or all pages by 90, 180 or 270 degrees. Fix scanner orientation.

Insert page numbering into a PDF: position, format (1 of N, Page 1), font and range.

Add diagonal semi-transparent text to every page. Protect drafts and copies.

Trim the margins of every page of a PDF by setting crop percentages.

Add text, highlights and annotations to existing PDFs. Edit directly in the browser.

Remove copy/print restrictions from PDFs you are authorized to modify.

Protect your PDF with a password (AES-256) and control print/copy permissions.

Apply AES-256 encryption and an opening password. Supports separate owner and user passwords.

Draw, type or upload your signature. Place it on any page.

Permanently remove sensitive text or images from a PDF. Drawn areas are replaced with black bars.

View metadata, page count, author, title and detailed size of a PDF.

Reduce MP4, MOV and WebM video size directly in the browser via ffmpeg.wasm.

Convert between MP4, AVI, MOV and WebM without uploading. Local processing.

Extract audio from a video (MP3, AAC, WAV) without re-encoding when possible.

Shows your public IP address, approximate location and internet provider.

Calculate your Body Mass Index with WHO classification.

Calculate your daily calorie needs (BMR and TDEE) using the Harris-Benedict equation.

Find out how much water to drink per day based on your weight and physical activity.

Broca, Lorentz, Devine and Hamwi formulas to estimate ideal body weight.

Split your calories into protein, carbs and fat according to your goal.

Calculate your ideal heart rate for each training zone.

Best times to sleep and wake up based on 90-minute cycles, by age group.

Fertile window, ovulation, next period and estimated due date using the Ogino-Knaus method.

BMI by WHO percentile for children and adolescents. Pediatric classification.

Estimate VO2 max using Cooper 12-minute, Rockport or HRmax/HRrest formulas.

Clinical stopwatch with 3-5 attempts and profile-based classification (Behlau).

Indicator of laryngeal dysfunction from the TMF /s/ to TMF /z/ ratio.

Auditory-perceptual voice assessment across 5 parameters scored 0-3.

Visual analog scale 0-100mm across 6 vocal attributes.

10-item Voice Handicap Index self-report questionnaire.

Pitch analysis with profile-based classification and musical note conversion.

Calculate vocal range in semitones and octaves for singers.

Words and syllables per minute with bradylalia/tachylalia classification.

Percentage of syllables with disfluencies and severity classification (Andrade).

Age-based language milestone screening (0 to 6 years).

Gordon-Brannan & Hodson: age-based normative data for child speech intelligibility.

Validated self-report questionnaire for dysphagia (Belafsky 2008).

7-level scale of oral intake functionality (Crary 2005).

Calculates equivalent daily vocal load weighted by activity type.

Interactive checklist with a score for protective vocal habits.

5 progressive tasks for pre-literacy screening (ages 4-8).