All Free Tools | Fieldlet

🎓 Learn

Grade, GPA, study, and classroom tools.

Grade CalculatorCalculate your weighted course grade from assignments, exams, and categories.Final Grade CalculatorFind the score you need on your final to reach a target course grade.Final Exam CalculatorPreview how different final-exam scores change your overall course grade.GPA CalculatorCalculate a credit-weighted GPA on a standard 4.0 scale.Weighted Grade CalculatorCalculate a course average when assignments or categories carry different weights.Easy GraderTurn questions missed into a test percentage and quick grading table.Test Grade CalculatorCalculate a test percentage from questions or points, including decimal partial credit.Semester GPA CalculatorProject your GPA for a single semester from course credits and expected grades.

🎲 Random

Pickers, generators, wheels, teams, and choices.

Random Number GeneratorGenerate one or many random numbers inside any range.Spin the WheelPaste choices into a wheel and pick one at random.Yes or No WheelMake a simple 50/50 yes-or-no decision.Random Name PickerPick one or more names, with an optional no-repeat draw history.Random Team GeneratorShuffle a list of people into balanced random teams.Random Word GeneratorGenerate random nouns, adjectives, verbs, or mixed words.Coin FlipFlip a virtual coin and track Heads and Tails results.Dice RollerRoll one to one hundred virtual dice with custom sides and common tabletop presets.

✍️ Write

Counters, text cleanup, comparison, and writing utilities.

Word CounterCount words, characters, sentences, paragraphs, and reading time instantly.Character CounterCount characters, words, spaces, and lines against an optional limit.Text CompareCompare two blocks of text and highlight added and removed lines.Case ConverterConvert text or identifiers to eight useful capitalization and separator styles.AlphabetizerSort a line-separated list from A to Z or Z to A.Duplicate Line RemoverRemove repeated lines from a list while preserving the first occurrence.Reading Time CalculatorEstimate reading time from text and a customizable words-per-minute speed.Speaking Time CalculatorEstimate speech or presentation duration from a script and speaking speed.Words to Pages CalculatorEstimate page count from a word count and customizable words per page.Pages to Words CalculatorEstimate word count from pages and a customizable words-per-page assumption.Word UnscramblerEnter letters and find dictionary words you can build from them instantly.Anagram SolverFind exact dictionary anagrams that use every supplied letter once.

⏱️ Focus

Timers and productivity tools that help you stay on task.

Pomodoro TimerUse focused work blocks with short and long break timers.Study TimerTrack an open-ended study session with pause and time markers.Countdown TimerSet a simple countdown in minutes and seconds.StopwatchRun a wall-clock stopwatch with pause, resume, reset, and up to fifty lap and split records.

🧮 Calculate

Fast everyday math and planning calculators.

Percentage CalculatorSolve the three most common percentage questions instantly.Percentage Change CalculatorCalculate the percentage increase or decrease between two values.Average CalculatorFind the mean, median, count, sum, minimum, and maximum of a number list.Ratio CalculatorSimplify a two-number ratio and scale the reduced terms by a shared multiplier.Age CalculatorCalculate age in years, months, days, and total days between dates.Date Difference CalculatorCalculate the number of days and weeks between two calendar dates.Days Between DatesCount calendar days and weekdays between two dates, with optional inclusive endpoints.Discount CalculatorCalculate savings, sale price, optional post-discount tax, and final total.Tip CalculatorCalculate tip, total bill, and an even per-person split.Time Duration CalculatorCalculate elapsed hours and minutes between two clock times.Hours CalculatorCalculate worked hours between two times after subtracting an unpaid break.Fraction CalculatorAdd, subtract, multiply, or divide two fractions and simplify the exact result.

🔄 Convert

Unit, data, and format converters.

Length ConverterConvert common metric and imperial length units instantly.Weight ConverterConvert milligrams, grams, kilograms, ounces, pounds, stones, and metric tons.Temperature ConverterConvert Celsius, Fahrenheit, and Kelvin temperatures instantly.Data Size ConverterConvert decimal and binary storage units from bytes through terabytes.Speed ConverterConvert common speed units including mph, km/h, m/s, ft/s, and knots.Area ConverterConvert square metric and imperial area units including acres and hectares.Volume ConverterConvert liters, milliliters, cubic meters, and common US volume units.Time ConverterConvert milliseconds, seconds, minutes, hours, days, and weeks.Pressure ConverterConvert Pa, kPa, bar, PSI, atmospheres, and millimeters of mercury.Energy ConverterConvert joules, kilojoules, calories, watt-hours, kWh, and BTU.Angle ConverterConvert angles among degrees, radians, gradians, and turns with one focused converter.

🖼️ Image

Private browser-based image utilities.

Image ResizerResize JPEG, PNG, or WebP images to exact pixel dimensions in your browser.Image CropperCrop a full-resolution JPEG, PNG, or WebP with pointer, keyboard, coordinate, and aspect-ratio controls.Image CompressorCompress an image as WebP or JPEG with an adjustable browser-local quality setting.JPG to PNG ConverterConvert a JPEG image to PNG locally without sending the source image to a server.PNG to JPG ConverterConvert PNG to JPEG with selectable quality and transparency background.WebP to JPG ConverterConvert WebP to JPEG with selectable quality and transparency background.WebP to PNG ConverterConvert a WebP image to PNG locally while preserving browser-decoded transparency.Image Dimensions CheckerCheck image width, height, aspect ratio, megapixels, format, and file size instantly.Aspect Ratio CalculatorSimplify a width-height ratio and solve a proportional width or height.Favicon GeneratorTurn a JPEG, PNG, or WebP image into common square PNG favicon and app-icon sizes.Image Color PickerSample an image pixel by pointer, keyboard, or exact coordinates and get HEX, RGB, and alpha values.

📄 File

Useful document and file utilities.

Merge PDFCombine multiple PDF files into one document locally in the order you select them.Extract PDF PagesChoose page numbers or ranges and save those pages as a new PDF locally.Remove PDF PagesDelete selected page numbers or ranges and download the remaining pages as a new PDF.Rearrange PDF PagesEnter a new page order and download a PDF with every page rearranged locally.Images to PDFCombine JPEG and PNG images into a Letter or A4 PDF with one fitted image per page.PDF Metadata ViewerRead PDF page count and common document metadata locally without modifying the file.CSV to JSON ConverterConvert comma-separated rows with a header into a JSON array of objects locally.JSON to CSV ConverterConvert a JSON array of objects into escaped CSV text and download the result.File Hash CalculatorCalculate SHA-256, SHA-384, or SHA-512 hashes for a local file without uploading it.

💻 Developer

Formatting, encoding, IDs, timestamps, and web utilities.

JSON Formatter & ValidatorValidate, pretty-print, or compact JSON directly in your browser.Base64 Encoder & DecoderEncode or decode UTF-8 text with standard Base64 or URL-safe Base64URL.URL Encoder & DecoderEncode text for URL components or decode percent-encoded values.UUID GeneratorGenerate one or many random UUID v4 identifiers locally.Unix Timestamp ConverterConvert Unix seconds or milliseconds to ISO dates, or turn local date-time values back into timestamps.HEX to RGB ConverterConvert HEX colors to RGB or RGB channels back to HEX with a live preview.Hash GeneratorGenerate SHA-1, SHA-256, SHA-384, or SHA-512 hexadecimal hashes locally.Regex TesterTest a JavaScript regular expression and flags against sample text in real time.Password GeneratorGenerate a random password locally with configurable length and character groups.