AER
01
Calculate & Convert
Math, finance, science, statistics, measurements, dates and everyday conversions.
02
Documents & Content
Document conversion, text processing, writing, citations and manuscript support.
03
Web & Technology
Developer, SEO, network, security, code, data and browser-based technical utilities.
04
Create & Organize
Design, images, charts, business, productivity, reference tools, games and more.
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Open a commonly used tool directly, or search the complete directory above.
Mathematics
Scientific Calculator
Advanced scientific calculator with trigonometric, logarithmic, power, root and constant functions.
Open tool →MathematicsPercentage Calculator
Calculate Percentage Calculator instantly with formulas, examples and clear results.
Open tool →Document Format ConverterWord (DOCX) to PDF
Convert a Microsoft Word DOCX document to PDF using TCPDF.
Open tool →DeveloperJSON Formatter & Validator
Free browser-based JSON Formatter & Validator for developers and technical users.
Open tool →SEOSEO Checker
Analyze a web page with SEO Checker and actionable on-page recommendations.
Open tool →FinanceCurrency Converter
Convert major world currencies using live public exchange-rate data when available.
Open tool →Creative & DesignImage Compressor
Reduce image dimensions or JPEG/WebP quality locally in the browser.
Open tool →Creative & DesignQR Code Generator
Generate QR codes for URLs or text using a public QR rendering endpoint.
Open tool →Writing & AcademicWord Counter
Use Word Counter to improve, measure or prepare written content.
Open tool →DIRECTORY
Tool categories
Choose a category to see only the tools relevant to that task.
AER
AGR
ART
AUT
BIO
BUS
Business & Productivity
Business documents, project planning, tracking and everyday productivity tools.
12 toolsBrowse category →
CHE
CHE
CIV
COM
CON
CON
CRE
DAT
Data & Reference
Data conversion, reference, charting, time and browser media utilities.
8 toolsBrowse category →
DEV
DOC
Document Format Converter
Private, transient document conversion utilities with strict file validation.
11 toolsBrowse category →
ELE
EMA
EVE
FIN
FOO
GAM
HEA
LIF
Health & Lifestyle
General informational calculators and private on-device lifestyle logs; not medical diagnosis.
17 toolsBrowse category →
HIS
IND
INS
MAT
Mathematics
Mathematics from arithmetic and school geometry through probability, vectors and advanced scientific calculations.
59 toolsBrowse category →
MEC
NET
PHY
RES
Researcher Tools
Manuscript preparation, references, identifiers, readability and pre-submission checks for academic researchers.
30 toolsBrowse category →
SEO
SOF
SOU
SPA
STA
TIK
WEB
WRI
Writing & Academic
Writing, citation, language and text-analysis utilities for academic and professional work.
25 toolsBrowse category →
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