Apps
TriVisionTech designs and ships small, focused software - native Android apps on Google Play and free browser-based web tools. Everything we have published is below.
- 8Android apps
- 80Web tools
- 6App categories
Productivity
Finance
Tools
Music & Audio
Photography
Food & Drink
Free web tools
Unit Converter
Convert length, weight, temperature, area, volume, speed, time, pressure, energy and data - instantly, in your browser.
Percentage Calculator
Percent of a number, percent change, discount price, and tip splitting - five common questions in one tool.
Compound Interest Calculator
See how savings grow over time with regular contributions and compound interest.
Image Resizer & Compressor
Shrink one photo or a whole batch to a target width and quality without uploading them anywhere.
Password Generator
Create long, random passwords in your browser - with a strength estimate and one-tap copy.
Hash Generator
Get the SHA-1, SHA-256 and SHA-512 digest of any text, computed locally.
Word & Character Counter
Live word, character, sentence and reading-time counts as you type.
Base64 Encoder / Decoder
Convert text to Base64 and back, with full Unicode support, in your browser.
Loan Calculator
Estimate the monthly payment, total cost and total interest on a fixed-rate loan.
Color Converter
Paste a colour in any common format and get HEX, RGB and HSL, with a live swatch.
Text Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and more.
JSON Formatter & Validator
Pretty-print, minify and check JSON for errors - locally, nothing uploaded.
URL Encoder / Decoder
Percent-encode text for safe use in URLs, or decode an encoded URL back to readable text.
Lorem Ipsum Generator
Generate paragraphs, sentences or words of classic Lorem Ipsum filler text.
Random Number Generator
Pick fair random numbers in any range, with an option for no repeats.
Age Calculator
Work out an exact age in years, months and days, plus the countdown to the next birthday.
BMI Calculator
Calculate Body Mass Index from height and weight, with the WHO category and a healthy-weight range.
UUID Generator
Generate random version-4 UUIDs (GUIDs), one or in bulk, instantly in your browser.
Unix Timestamp Converter
Convert Unix time (epoch seconds or milliseconds) to a readable date, or a date to a timestamp, instantly in your browser.
QR Code Generator
Turn any text or URL into a scannable QR code and download it as a PNG - instantly in your browser.
CPF Generator
Generate valid random CPF numbers with correct check digits, for testing forms and validation logic.
CNPJ Generator
Generate valid random CNPJ numbers with correct check digits, for testing forms and validation logic.
Test Credit Card Number Generator
Generate Luhn-valid fake card numbers, expiry dates and CVVs for testing payment forms.
Fake Person Generator (Brazil)
Generate a complete fake Brazilian profile: name, CPF, RG, address, phone and email, for testing.
LinkedIn Search URL Builder
Turn a target profile into a ready-to-open LinkedIn people-search link with the filters already applied.
Currency Converter
Convert between 150+ currencies using up-to-date reference exchange rates.
GitHub Repository Finder
Find the top open-source projects for any topic and language, ranked by stars, forks or recent activity.
Android Launcher Icon Generator
Turn text, an emoji or an image into a full set of Android launcher icons, ready to drop into your project.
Icon Library and Downloader
Search hundreds of thousands of open-source icons, recolour them and download SVG or PNG.
Background Remover
Remove any photo background automatically with AI and download a transparent PNG - no upload, no sign-up.
Photo Enhancer
Fix exposure and colour, sharpen, or one-click auto-enhance a photo - all in your browser.
Photo Collage Maker
Drop a few photos into a grid, set the spacing and shape, and download the collage as a PNG.
FGTS Calculator
Estimate your FGTS balance month by month, the termination fine and how much you can withdraw - with 13th salary, vacation, notice and fund correction.
Fixed Income Calculator
Compare CDB, LCI/LCA, Tesouro Selic, fixed-rate, IPCA+ and savings side by side, net of income tax, with today's Banco Central rates.
Net Salary Calculator
From gross to net pay with the 2026 INSS and income tax tables, including the new exemption up to R$ 5,000, dependents and common deductions.
Termination Pay Calculator
What you receive when a job ends in Brazil: salary balance, notice, proportional 13th and vacation, INSS and income tax, FGTS fine and withdrawal.
Vacation Pay Calculator
Vacation pay with the one-third bonus, sold days (abono pecuniário), 13th advance, INSS and income tax with the 2026 tables.
13th Salary Calculator
The Brazilian 13th salary by months worked, with the first instalment, INSS and income tax on the second, using the 2026 tables.
Hours Calculator
Add up the hours you worked in the week from your clock-in times, with breaks, night shifts, overtime and pay per hour - or add and subtract any list of hours.
Business Days Calculator
Count the working days between two dates or find the date N working days ahead, skipping weekends and Brazilian national holidays.
Rule of Three Calculator
Solve any rule of three - direct or inverse - and see the calculation step by step, with ready-made examples.
Simple Interest Calculator
Work out simple interest and the final amount - or find the rate, the capital or the term - with the formula step by step and a comparison with compound interest.
Gestational Age Calculator
How many weeks pregnant am I? Gestational age, due date and the prenatal milestones - from the last period, an ultrasound or the conception date.
Pix QR Code Generator
Create a Pix QR code and the copy-and-paste code for any key, with an optional amount and message - free, following the Banco Central standard.
WhatsApp Link Generator
Create a WhatsApp link with your number and a ready-made message for your Instagram bio, site or ads - plus a QR code to print.
WhatsApp Sticker Maker
Turn any photo into a WhatsApp sticker: the AI cuts out the subject, you add an outline and a caption, and download a 512 × 512 WebP - free and private.
Meme Generator
Make a meme from your own photo in seconds - classic top and bottom text or a caption above the image - and download it as JPG or PNG.
Fancy Text Generator
Type once and get your text in 16 styles - bold, italic, cursive, gothic, bubbles, upside down… - ready to copy into Instagram, WhatsApp or TikTok.
Emoji Copy and Paste
All the emojis in one place: search by name in your language, browse by category and click to copy - or build a whole sequence and copy it at once.
Merge PDF
Join several PDFs into one in the order you choose - free, no sign-up and without uploading your files.
Images to PDF
Turn photos, scans and screenshots into a single PDF - one page per image, A4, Letter or original size - without uploading anything.
Split PDF
Take only the pages you need from a PDF, or split it into one PDF per page - free, private and in your browser.
Compress PDFNew
Shrink a PDF to send it by email or upload it to a form — free, private and in your browser.
Countdown Timer
A live countdown in days, hours, minutes and seconds to Christmas, New Year, Carnival or any date - with a link to share.
Barbecue Calculator
Work out the meat per person by cut, plus beer, soft drinks, charcoal, ice and garlic bread - with a shopping list to copy or send by WhatsApp.
Secret Santa Draw
Draw names for Secret Santa online, free and without sign-up: each person gets a private link that shows only who they drew.
PDF to Image (JPG/PNG)
Turn every page of a PDF into a JPG or PNG image, up to 300 dpi - free, without sign-up and without uploading the file.
Image to Text (OCR)
Copy the text of a photo, scanned document or screenshot in English, Portuguese or Spanish - free, and the image never leaves your device.
Video Converter
Convert videos between MP4, WebM, MOV and MKV in your browser - free, no sign-up and without uploading the file.
Audio Converter
Convert audio - or the sound of a video - to MP3, M4A, WAV, OGG, FLAC or AAC in your browser, free and without uploading it.
Extract Audio from Video
Save the sound of any video as MP3, M4A or WAV - free, no sign-up and without uploading the video.
Remove Audio from Video
Take the sound out of a video and keep the picture - free, no sign-up and without uploading it.
Emoji Downloader
Pick one emoji, a whole category or everything you search and download them as PNG (72-512 px) or SVG in one ZIP.
Emoji Maker
Build a custom emoji from eyes, mouths, colours and accessories and download it as PNG or SVG - free, no sign-up.
AI Image Generator
Describe a picture, pick a style and format, and open a ready-to-run prompt in Bing Image Creator or ChatGPT - free.
Printable Activities for Kids
Make free printable worksheets for children in seconds: maths with an answer key, handwriting practice, an illustrated alphabet, counting and language flashcards — as an A4 PDF.
Calorie CalculatorNew
Work out your basal metabolic rate and daily calories for your activity level, with targets to lose, keep or gain weight and how much water to drink.
Text CompareNew
Paste two versions of a text and see exactly what was added and removed, word by word or line by line, with how similar they are - nothing is uploaded.
Password Strength CheckerNew
See how strong a password really is, how long it would take to guess in three attack scenarios and what to change - checked in your browser, never sent.
Menstrual Cycle CalculatorNew
Find out when your next period is due, your fertile days and the estimated ovulation day, with the next six cycles on a calendar.
Maternity Leave Calculator (Brazil)New
Work out when maternity leave ends under Brazil's CLT (120 or 180 days), the return-to-work date with vacation, job stability and breastfeeding breaks.
Quadratic Equation SolverNew
Solve ax² + bx + c = 0 with the quadratic formula: discriminant, real or complex roots, vertex, the steps and the graph of the parabola.
GCD and LCM CalculatorNew
Find the greatest common divisor and least common multiple of 2 to 10 numbers, with each number's prime factorization and Euclid's steps.
Grade Average CalculatorNew
Work out your simple or weighted grade average, whether it reaches the passing grade and the grade you need on the next test.
Days Between Dates CalculatorNew
Count the days between two dates in days, weeks and months with weekends shown, or add and subtract days from a date to see the resulting day.
Pregnancy Weight Gain CalculatorNew
See the recommended weight gain for your pre-pregnancy BMI, the range for your current week and where your gain sits, on a week-by-week chart.
Cash or Installments CalculatorNew
Find out whether a cash discount beats paying in instalments, counting what your money earns meanwhile, and see the interest hidden in the plan.
Spin the WheelNew
Type names or options, spin the wheel and get a fair random winner — for classes, giveaways, games and decisions. Free, no sign-up.
Typing Speed TestNew
Type a short text for 30 seconds, 1 or 2 minutes and see your speed in words per minute, your accuracy and your level. Free, no sign-up.
Pomodoro TimerNew
A free Pomodoro timer: 25-minute focus blocks, short and long breaks, a soft sound at the end and today’s count of focus blocks. No sign-up.