Multiple Conversion Formats
Convert audio files such as M4A, MP3, and WAV; video files such as MP4, WEBM, and MOV; and images such as JPG, PNG, and WEBP into formats suited to your needs.
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Easy for BeginnersFile Selection Type
Merge PDFs
Merge multiple PDFs into one file in your preferred order.
PDF & DocumentsMerge
Easy for BeginnersFile Selection Type
Compress PDF
Reduce PDF file size for easier sharing.
PDF & DocumentsCompress
Easy for BeginnersFile Selection Type
JPG to PDF
Combine multiple photos into a PDF in their original order.
PDF & DocumentsConvert Images
Easy for BeginnersFile Selection Type
PDF to JPG
Convert PDF pages to JPG images.
PDF & DocumentsConvert Images
Easy for BeginnersFile Selection Type
All-in-One Hangul and Office Document Converter
Convert HWP, HWPX, Word, Excel, and PowerPoint files to PDF, DOCX, XLSX, PPTX, or open document formats.
PDF & DocumentsConvert PDF
Easy for BeginnersFile Selection Type
HWP to PDF
Converts Korean Hangul HWP documents to PDF. Requires the LibreOffice HWP filter.
PDF & DocumentsHWP·HWPX
Easy for BeginnersFile Selection Type
Excel to PDF
Convert XLS, XLSX, ODS, and CSV spreadsheets to PDF.
PDF & DocumentsConvert PDF
Easy for BeginnersFile Selection Type
Convert PowerPoint to PDF
Convert PPT, PPTX, and ODP presentations to PDF.
PDF & DocumentsConvert PDF
Easy for BeginnersFile Selection Type
Online Image Editor
Crop, resize, rotate, apply partial transparency, and adjust HDR and filters on one screen.
ImageColor & Correction
Easy for BeginnersFile Selection Type
All-in-One Image File Converter
Batch-convert JPG, PNG, WEBP, GIF, BMP, TIFF, PDF, PPM, and TGA images to your preferred format.
ImageFile Format
Easy for BeginnersFile Selection Type
Automatic HDR Photo Enhancement
Adjusts auto levels, shadows, highlights, and sharpness in real time.
ImageColor & Correction
Easy for BeginnersFile Selection Type
Make Selected Colors Transparent
Make only the areas with colors similar to the selected color transparent.
ImageColor & Correction
Easy for BeginnersFile Selection Type
Reduce Image File Size
Reduce photo file size without significantly compromising image quality.
ImageReduce File Size
Easy for BeginnersFile Selection Type
Resize Image
Resize a photo to your desired width and height in pixels.
ImageCrop & Resize
Easy for BeginnersFile Selection Type
Crop Image
Crop and save only the required area of a photo.
ImageCrop & Resize
Easy for BeginnersFile Selection Type
PNG to JPG
Convert PNG images to JPG format.
ImageFile Format
Easy for BeginnersFile Selection Type
All-in-One Video Format and Audio Converter
Convert videos to MP4, WEBM, MOV, MKV, AVI, M4V, MPG, OGV, or GIF, or extract audio only in MP3, WAV, or M4A format.
VideoFormat & Audio
Easy for BeginnersFile Selection Type
Reduce Video File Size
Reduce video file size for easier sharing.
VideoCrop & Compress
Easy for BeginnersFile Selection Type
Extract MP3 from Video
Save only the audio from the video as an MP3 file.
VideoFormat & Audio
Easy for BeginnersFile Selection Type
All-in-One Audio File Converter
Batch-convert M4A, MP3, WAV, AAC, FLAC, OGG, OPUS, WMA, AC3, AIFF, and CAF audio files to your preferred format.
AudioFormat Conversion
Easy for BeginnersFile Selection Type
M4A to WAV
Convert M4A audio to lossless PCM WAV, suitable for editing and archiving.
AudioFormat Conversion
Easy for BeginnersFile Selection Type
M4A to MP3
Convert M4A audio to MP3 for playback on most devices.
AudioFormat Conversion
Easy for BeginnersDirect Input
Character Counter
Count characters with and without spaces, and count words.
Writing & LifestyleText & Characters
Easy for BeginnersDirect Input
Discount Calculator
Calculate the discount amount and final payment amount.
CalculatorLifestyle
Easy for BeginnersDirect Input
BMI Calculator
Calculate body mass index from height and weight.
CalculatorHealth
Easy for BeginnersDirect Input
Home affordability calculator
Calculates your affordable home price and loan limit using your own funds, LTV, DSR, and interest rate.
CalculatorLoans & Financing
Easy for BeginnersDirect Input
Equal Principal and Interest Payment Calculator
Calculate monthly payments, total interest, total repayment amount, and the repayment schedule for the first 12 months.
CalculatorRepayment Method
Easy for BeginnersDirect Input
DSR Loan Limit Calculator
Calculates additional borrowing capacity based on annual income, DSR limit, existing principal-and-interest payments, interest rate, and loan term.
CalculatorLimits & Regulations
Easy for BeginnersDirect Input
Loan Refinancing Comparison Calculator
Compare the monthly payments, total costs, and break-even period in months for your existing and new loans.
CalculatorCompare Products
Easy for BeginnersDirect Input
Stock Return Calculator
Calculate profit or loss and return based on buy and sell prices and quantities.
CalculatorTrading & Profit/Loss
Easy for BeginnersDirect Input
Stock Average Cost Calculator
Calculate the average purchase price after buying additional shares.
CalculatorTrading & Profit/Loss
Easy for BeginnersDirect Input
Quick monthly take-home pay calculator
Calculate estimated take-home pay from monthly salary and deduction rates.
CalculatorSalary
Easy for BeginnersDirect Input
Vehicle Fuel Cost Calculator
Estimate fuel costs from distance, fuel efficiency, and fuel price.
CalculatorLifestyle
Easy for BeginnersDirect Input
Length Unit Converter
Convert between mm, cm, m, km, inches, and feet.
Unit ConversionLength & Area
Easy for BeginnersDirect Input
Convert Pyeong and Area Units
Convert area units, including square meters and pyeong.
Unit ConversionLength & Area
Easy for BeginnersFile Selection Type
OCR Scanned PDF
Convert scanned PDFs into searchable PDFs with selectable and copyable text.
PDF & DocumentsOCR
Everything from file conversion to calculations and diagnostics in one place
REGOLITH is more than a collection of links. It provides functional web tools that take you from entering data and running tasks to reviewing and saving results. Original files remain unchanged, with results created separately. Each tool page explains supported formats, usage steps, and how to review results before you begin.
Getting Started Guide
Instructions for selecting files, configuring options, running tools, and saving results are available on a separate guide page and within each tool.
Detailed Task Descriptions
Provides format characteristics, recommended uses, guidelines for verifying calculation results, and precautions for handling sensitive files.