Free online tools to create, edit and calculate

139 free tools: AI prompt generators, image editors, text and developer utilities, calculators and DJ tools. No sign-up needed.

All tools

Event Ticket / Pass Prompt Generator - Detailed AI prompt for realistic printable event tickets with stub, perforation and a blank number box.
DJ Logo Prompt Generator - Build an AI prompt for an original DJ or music brand logo.
Music Flyer Prompt Generator - Prompt for a 3000 x 3000 px square music flyer from your background and two artist photos.
DJ Event Flyer Prompt Generator - Prompt that turns a DJ photo into a nightclub event flyer while keeping the real face.
Image Resizer - Scale an image by percentage.
Image Resizer (Width x Height) - Resize an image to exact pixel dimensions or by percentage, with aspect ratio lock and social media presets.
Image Compressor - Reduce file size with JPEG quality.
Image Format Converter - Convert to PNG, JPEG or WebP.
Image Rotator - Rotate by 90, 180 or 270 degrees.
Image Flipper - Flip horizontally or vertically.
Image to Grayscale Converter - Remove color.
Image Blur Tool - Apply Gaussian blur.
Image Brightness Adjuster - Make an image lighter or darker.
Image Contrast Adjuster - Adjust contrast.
Image Color Inverter - Invert colors.
Uppercase Converter - Convert text to UPPERCASE.
Lowercase Converter - Convert text to lowercase.
Title Case Converter - Capitalize the first letter of every word.
Sentence Case Converter - Capitalize the first letter of each sentence.
Alternating Case Converter - Alternate lower and upper case letters.
Inverse Case Converter - Swap upper and lower case.
Reverse Text Generator - Reverse every character.
Reverse Word Order - Reverse the order of the words.
Text to Slug Converter - Make a URL-friendly slug.
Text to Binary Converter - Encode text as 8-bit binary (UTF-8).
Binary to Text Converter - Decode binary bytes to text.
Text to Morse Code Converter - Letters and numbers to Morse code.
Remove Extra Spaces - Collapse repeated spaces and trim lines.
Remove Duplicate Lines - Keep only the first copy of each line.
Sort Lines Alphabetically - Sort lines A to Z.
Add Line Numbers - Number each line.
Remove Line Breaks - Join all lines into one.
Text Cleaner - Remove extra spaces, blank lines and invisible characters.
Find and Replace Text - Replace every match of a word or phrase.
Text Repeater - Repeat text several times (max 1000).
Lorem Ipsum Generator - Generate placeholder paragraphs.
Word Counter - Count words, characters, sentences, paragraphs and reading time.
JSON Formatter - Pretty-print JSON.
JSON Validator - Check whether JSON is valid.
JSON Minifier - Remove whitespace from JSON.
CSS Minifier - Basic CSS minifier (removes comments and whitespace).
HTML Minifier - Basic HTML minifier (removes comments and extra whitespace). Does not process inline scripts.
URL Encoder - Percent-encode text for URLs.
URL Decoder - Decode percent-encoded text.
HTML Entity Encoder - Escape &, <, >, quotes.
HTML Entity Decoder - Decode HTML entities safely.
Base64 Encoder - Encode text (UTF-8) to Base64.
Base64 Decoder - Decode Base64 to text.
UUID Generator - Generate version 4 UUIDs with the browser crypto API.
Percentage Calculator - What is X percent of Y, and what percent is X of Y.
Age Calculator - Exact age from a birth date.
Date Difference Calculator - Days between two dates.
Image Aspect Ratio Calculator - Aspect ratio of a width and height.
File Size Calculator - Convert between bytes, KB, MB and GB (1024 base).
Color Picker and HEX Converter - Pick a color and see HEX, RGB and HSL.
Password Generator - Secure random passwords (crypto.getRandomValues).
RBC Indices Calculator - MCV, MCH and MCHC from one set of values.
MCV Calculator - Mean corpuscular volume.
MCH Calculator - Mean corpuscular hemoglobin.
MCHC Calculator - Mean corpuscular hemoglobin concentration.
Absolute Neutrophil Count Calculator - Absolute neutrophil count from WBC and differential.
Absolute Eosinophil Count Calculator - Absolute eosinophil count from WBC and differential.
Absolute Lymphocyte Count Calculator - Absolute lymphocyte count from WBC and differential.
Absolute Monocyte Count Calculator - Absolute monocyte count from WBC and differential.
Absolute Basophil Count Calculator - Absolute basophil count from WBC and differential.
Corrected WBC Count Calculator - Correct WBC for nucleated red cells.
Corrected Reticulocyte Count Calculator - Retic % corrected for anemia.
Reticulocyte Production Index Calculator - RPI with maturation correction.
Mentzer Index Calculator - Compare microcytic anemia patterns.
Neutrophil-to-Lymphocyte Ratio Calculator - NLR from absolute counts.
Platelet-to-Lymphocyte Ratio Calculator - PLR from platelet and lymphocyte counts.
Systemic Immune-Inflammation Index Calculator - SII from platelets, neutrophils and lymphocytes.
Corrected Calcium Calculator - Calcium adjusted for albumin.
Anion Gap Calculator - Serum anion gap without potassium.
Globulin Calculator - Globulin from total protein and albumin.
Albumin/Globulin Ratio Calculator - A/G ratio.
BUN/Creatinine Ratio Calculator - Ratio of urea nitrogen to creatinine.
Estimated GFR Calculator - CKD-EPI 2021 creatinine equation (race-free).
Creatinine Clearance Calculator - Cockcroft-Gault estimate.
Corrected Sodium Calculator - Sodium corrected for hyperglycemia.
Calculated Serum Osmolality Calculator - Estimated osmolality.
LDL Cholesterol Calculator - Friedewald estimate.
Non-HDL Cholesterol Calculator - Total minus HDL.
Total Cholesterol/HDL Ratio Calculator - Atherogenic ratio.
Estimated Average Glucose Calculator - eAG from HbA1c.
Body Mass Index Calculator - BMI from weight and height.
Immature Granulocyte Count Calculator - Absolute immature granulocytes (IG).
Absolute Nucleated RBC Count Calculator - NRBC per uL.
Osmolar Gap Calculator - Measured minus calculated serum osmolality.
Delta Ratio (Delta Gap) Calculator - Anion gap and delta ratio for mixed acid-base disorders.
Albumin-Corrected Anion Gap Calculator - Anion gap adjusted for low albumin.
LDL Cholesterol (Sampson / NIH) Calculator - LDL-C by the Sampson equation, valid up to triglycerides of 800 mg/dL.
Atherogenic Index of Plasma (AIP) Calculator - log10 of the triglyceride to HDL ratio.
Transferrin Saturation Calculator - Serum iron as a percentage of total iron-binding capacity.
HOMA-IR and HOMA-Beta Calculator - Insulin resistance and beta-cell function from fasting values.
Fractional Excretion of Sodium (FENa) Calculator - Helps separate prerenal from intrinsic kidney injury.
Fractional Excretion of Urea (FEUrea) Calculator - FEUrea, useful when diuretics make FENa unreliable.
Urine Albumin-Creatinine Ratio (UACR) Calculator - Albuminuria category from a spot urine sample.
Pediatric eGFR (Bedside Schwartz) Calculator - Estimated GFR for children from height and creatinine.
Free Water Deficit Calculator - Water needed to correct high serum sodium.
Calcium-Phosphate Product Calculator - Serum calcium multiplied by phosphate.
Indirect Bilirubin Calculator - Unconjugated bilirubin from total and direct values.
AST/ALT Ratio (De Ritis) Calculator - Ratio of AST to ALT.
FIB-4 Index Calculator - Non-invasive liver fibrosis score.
APRI Calculator - AST to platelet ratio index for liver fibrosis.
MELD and MELD-Na Calculator - End-stage liver disease severity scores.
Child-Pugh Score Calculator - Severity class of chronic liver disease.
HbA1c Converter (% and mmol/mol) - Convert between NGSP percent and IFCC mmol/mol.
Clinical Lab Unit Converter - Convert common analytes between conventional and SI units.
Body Surface Area (BSA) Calculator - BSA by the Mosteller and DuBois formulas.
Absolute Reticulocyte Count Calculator - Reticulocyte percentage converted to an absolute count.
Hematocrit and Hemoglobin Rule of Three - Quick estimate of hematocrit from hemoglobin or the reverse.
Manual Cell Count (Hemocytometer) Calculator - Cells per microliter from a counting chamber.
Allowable Blood Loss Calculator - Maximum blood loss before reaching a chosen hematocrit.
Iron Deficit (Ganzoni) Calculator - Total iron needed to correct anemia and refill stores.
Estimated Blood Volume (Nadler) Calculator - Blood volume from height, weight and sex.
Corrected Count Increment (CCI) Calculator - Response to a platelet transfusion.
Fetomaternal Hemorrhage and RhIG Dose Calculator - Fetal bleed volume and number of Rh immune globulin vials.
PRBC Volume to Raise Hemoglobin Calculator - Estimated red cell volume for a target hemoglobin.
Transfusion Volume by Weight Calculator - Typical paediatric component doses.
Exchange Transfusion Volume Calculator - Blood volume for a neonatal exchange transfusion.
Compatible Unit Probability Calculator - How many units to screen when antibodies need antigen-negative blood.
CFU per mL Calculator - Colony count converted to CFU per mL.
Serial Dilution Calculator - Final concentration and volumes for a dilution series.
McFarland Standard Adjustment Calculator - Diluent needed to bring a suspension to a target turbidity.
Log Reduction Calculator - Log10 reduction and percent reduction in microbial count.
Bacterial Doubling Time Calculator - Generations and generation time from two counts.
C1V1 = C2V2 Dilution Calculator - Stock volume and diluent for a working solution.
Molarity to Mass Calculator - Grams of solute for a molar solution.
Diagnostic Test Accuracy (2x2 Table) Calculator - Sensitivity, specificity, predictive values and likelihood ratios.
Predictive Value (PPV and NPV) Calculator - Predictive values from sensitivity, specificity and prevalence.
QC: CV% and Sigma Metric Calculator - Coefficient of variation and sigma score for an assay.
Levey-Jennings Z-Score Calculator - How many SD a control result is from the mean.
Malaria Parasite Density (Thick Smear) Calculator - Parasites per microliter of blood.
Membrane Filter Count (CFU per 100 mL) Calculator - Water testing colony count by membrane filtration.
Urine Culture Colony Count Calculator - CFU/mL from a calibrated loop.
BPM and Beat Matching Helper - Pitch change needed to match two tracks. Calculator only.
YouTube DJ Mixing Player - Dual deck YouTube player with volume crossfader.
DJ Contract Generator - Create a DJ or artist booking agreement. Copy it, download TXT or PDF, or print.

Free online tools to create, edit and calculate

Categories

All tools