Popular tools
most usedPercentage Calculator
Four modes: % of a number, ratios, increase and decrease.
Word & Character Counter
Live word, character, sentence and reading-time counts.
JSON Formatter & Validator
Pretty-print, minify, and validate JSON with error locations.
Image Compressor
Shrink JPG/PNG/WebP with a quality slider and size compare.
Password Generator
Strong random passwords with a live strength meter.
QR Code Generator
QR codes for URLs, text, WiFi, and vCards — PNG or SVG.
Unit Converter
Convert length, weight, temp, area, volume, speed, time.
Case Converter
Switch between 9 text cases including camelCase and snake_case.
Calculators
11 toolsPercentage Calculator
Four modes: % of a number, ratios, increase and decrease.
Age Calculator
Exact age or time between two dates, down to the hour.
BMI Calculator
Body Mass Index with metric/imperial and category badge.
Loan EMI Calculator
Monthly EMI, total interest, and amortization table.
Compound Interest Calculator
Project growth with any compounding frequency, plus chart.
Tip Calculator
Tip amount and per-person split for any group size.
Discount Calculator
Final sale price, savings, and reverse discount percent.
GST / Sales Tax Calculator
Add or remove tax with GST presets or a custom rate.
Multiply Polynomials Calculator
Multiply two polynomials, with step-by-step working.
Simplify Square Root Calculator
Reduce a square root to simplest radical form.
Math Equation Generator
Generate printable math practice worksheets.
Finance
19 toolsSIP Calculator
Estimate mutual fund SIP maturity, invested amount and returns.
Lumpsum Calculator
Estimate returns on a one-time lumpsum investment.
FD Calculator
Fixed deposit maturity and interest with any compounding.
RD Calculator
Recurring deposit maturity and interest on monthly deposits.
PPF Calculator
Project PPF maturity with yearly contributions and interest.
Income Tax Calculator
Compare new vs old regime tax for FY 2025-26 in India.
Gratuity Calculator
Estimate gratuity from salary and years of service.
HRA Calculator
Calculate exempt and taxable House Rent Allowance.
NPS Calculator
Project NPS corpus, lump sum and monthly pension.
Home Loan EMI Calculator
Home loan EMI, total interest and amortization schedule.
Car Loan EMI Calculator
Car loan EMI after down payment, plus total interest.
Simple Interest Calculator
Simple interest and total, with compound comparison.
Inflation Calculator
Future cost of money and real value after inflation.
401(k) Calculator
Project your 401(k) balance at retirement.
403(b) Calculator
Project your 403(b) balance at retirement.
457(b) Calculator
Project your 457(b) balance at retirement.
Roth IRA Calculator
Project your tax-free Roth IRA balance at retirement.
Retirement Drawdown Calculator
See how long your retirement savings will last.
Annuity Calculator
See the monthly income a lump sum can pay out.
Text & Writing
22 toolsWord & Character Counter
Live word, character, sentence and reading-time counts.
Case Converter
Switch between 9 text cases including camelCase and snake_case.
URL Slug Generator
Turn titles into clean, lowercase, hyphenated URL slugs.
Lorem Ipsum Generator
Generate placeholder text by words, sentences, or paragraphs.
Remove Duplicate Lines
Delete repeated lines from lists, with trim and sort options.
Find and Replace
Bulk find & replace with regex and case-sensitive options.
Text Reverser
Reverse text by characters, words, or line order.
Character Counter
Count characters, words, sentences and check length limits live.
Sort Lines Alphabetically
Sort lines A-Z, by length, reverse, shuffle, or dedupe.
Word Frequency Counter
Rank the most-used words in any text, top 50.
Text to Speech
Read any text aloud with adjustable voice, rate and pitch.
Add Line Numbers
Prefix every line with a number, with custom start and padding.
Remove Empty Lines
Strip blank lines or collapse extra ones into a single break.
Repeat Text
Duplicate text N times with your choice of separator.
Text Diff Checker
Compare two texts and highlight added and removed lines.
Random Word Generator
Generate any number of random English words in a click.
Reverse Words
Flip the order of words in every line, letters intact.
Extract Emails
Find, dedupe and sort all email addresses in text.
Extract URLs
Find, dedupe and list all links in a block of text.
Title Case Converter
Convert headlines to correct Title Case with real rules.
Upside Down Text
Turn text into flipped upside-down unicode you can paste anywhere.
Text to Handwriting
Turn typed text into a handwriting image (English & Hindi).
AI Text Tools
8 toolsAI Text Cleaner
One-click cleanup for AI text: quotes, dashes, invisible chars, spacing.
Em Dash Remover
Replace every em-dash and en-dash with a hyphen, comma, or space.
Invisible Character Remover
Strip zero-width spaces, joiners, and hidden unicode from your text.
Smart Quote Converter
Convert curly quotes to straight, or straight quotes to curly.
Markdown Stripper
Remove all Markdown syntax and get clean, readable plain text.
Whitespace Remover
Trim, collapse, or strip all whitespace with before/after counts.
Accent Remover
Strip accents and diacritics: é→e, ñ→n, ü→u, and more.
Line Break Remover
Remove line breaks and join text with a space, comma, or nothing.
Developer / SEO
36 toolsJSON Formatter & Validator
Pretty-print, minify, and validate JSON with error locations.
Base64 Encoder / Decoder
Encode/decode Base64 for text and files (drag & drop).
URL Encoder / Decoder
Percent-encode/decode URLs (component or full-URL).
Meta Tag Generator
Build SEO, Open Graph, and Twitter meta tags to paste.
Robots.txt Generator
Create and download a valid robots.txt file.
Password Generator
Strong random passwords with a live strength meter.
Hash Generator
MD5, SHA-1, SHA-256 and SHA-512 from text or files.
UUID Generator
Generate secure random v4 UUIDs (GUIDs) in bulk.
Regex Tester
Test regex patterns live with highlighted matches & groups.
JWT Decoder
Decode a JWT's header & payload with readable expiry.
Cron Expression Explainer
Translate a cron expression into plain English.
Markdown to HTML Converter
Convert Markdown to HTML with a live preview.
HTML to Markdown Converter
Convert HTML back into clean Markdown syntax.
JSON to CSV Converter
Turn a JSON array of objects into clean CSV.
CSV to JSON Converter
Convert CSV into a JSON array of objects.
JSON to YAML Converter
Convert JSON into clean, indented YAML.
YAML to JSON Converter
Convert indentation-based YAML into JSON.
HTML Entity Encoder / Decoder
Encode/decode HTML entities (< & ©).
SQL Formatter
Beautify SQL: uppercase keywords + clause breaks.
CSS Minifier
Minify CSS and see the bytes you save.
JavaScript Minifier
Light JS minifier — strips comments & whitespace.
HTML Minifier
Minify HTML — strip comments & inter-tag whitespace.
Color Contrast Checker
Check WCAG contrast ratio (AA/AAA) for two colors.
UTM Link Builder
Build UTM-tagged campaign tracking URLs.
Unix Timestamp Converter
Convert Unix epoch time ↔ human date (local & UTC).
JSON Viewer
Open JSON as an expandable, collapsible tree.
XML Validator
Check XML is well-formed and pretty-print it.
Number Base Converter
Convert numbers between any base 2–36: binary, octal, decimal, hex.
Binary to Decimal Converter
Two-way binary ↔ decimal converter that stays in sync as you type.
Hex to Decimal Converter
Two-way hex ↔ decimal converter with 0x/# support and live sync.
Roman Numeral Converter
Two-way Roman numeral ↔ number converter for 1 to 3999.
Number to Words Converter
Spell numbers in words — International or Indian, with currency mode.
ASCII Converter
Convert text ↔ ASCII codes in decimal or hex, both ways.
Text to Binary Converter
Convert text ↔ binary — 8 bits per character, both directions.
Lua Syntax Checker
Validate Lua and pinpoint syntax errors by line.
Lua Obfuscator
Minify Lua and encode its strings to obscure code.
Image & Media
33 toolsImage Compressor
Shrink JPG/PNG/WebP with a quality slider and size compare.
Image Resizer
Resize by pixels or percent, with aspect-ratio lock.
Image Format Converter
Convert between JPG, PNG, and WebP locally.
Favicon Generator
One image → all favicon sizes, .ico, and HTML snippet.
Image Cropper
Crop images to an exact pixel rectangle and download a PNG.
Image Rotator & Flipper
Rotate 90°/180° and flip images, then download a PNG.
Add Watermark to Image
Overlay a text watermark on an image and download it.
Image to Base64
Turn an image into a Base64 data URL you can paste anywhere.
Base64 to Image
Decode a Base64 / data URL string back into a downloadable image.
PNG to WebP Converter
Convert images to WebP with a quality slider and size readout.
WebP to PNG Converter
Convert WebP images to lossless PNG and download them.
PNG to JPG Converter
Convert images to JPG with a quality slider; transparency flattened.
Image Color Picker
Sample any pixel's HEX & RGB color from an image by clicking.
Grayscale Image Converter
Turn images black & white with luminance grayscale; download.
Blur Image
Blur an image with an adjustable radius and download it.
Image Palette Extractor
Pull the dominant colors from an image as HEX swatches.
Audio Compressor
Shrink WAV / audio files — downsample & mono, in-browser.
JFIF to PNG Converter
Convert JFIF images to PNG — batch, in-browser.
JFIF to JPG Converter
Convert JFIF images to JPG — batch, in-browser.
WebP to JPG Converter
Convert WebP images to JPG — batch, in-browser.
JPG to WEBP Converter
Convert JPG images to WEBP — batch, in-browser.
BMP to PNG Converter
Convert BMP images to PNG — batch, in-browser.
BMP to JPG Converter
Convert BMP images to JPG — batch, in-browser.
GIF to PNG Converter
Convert GIF images to PNG — batch, in-browser.
AVIF to PNG Converter
Convert AVIF images to PNG — batch, in-browser.
AVIF to JPG Converter
Convert AVIF images to JPG — batch, in-browser.
ICO to PNG Converter
Convert ICO images to PNG — batch, in-browser.
Audio to WAV Converter
Convert audio to WAV — in-browser, no upload.
M4A to WAV Converter
Convert M4A to WAV — in-browser, no upload.
OGG to WAV Converter
Convert OGG to WAV — in-browser, no upload.
MP3 to WAV Converter
Convert MP3 to WAV — in-browser, no upload.
PNG to RAW Converter
Export a PNG as uncompressed RAW pixel bytes.
JPG to RAW Converter
Export a JPG as uncompressed RAW pixel bytes.
PDF Tools
10 toolsMerge PDF
Combine several PDFs into one — nothing uploaded.
Split PDF
Extract a page range from a PDF — nothing uploaded.
Rotate PDF
Rotate PDF pages 90/180/270° — nothing uploaded.
Delete PDF Pages
Remove specific pages from a PDF — nothing uploaded.
Reorder PDF Pages
Rearrange PDF pages into a new order.
JPG to PDF
Turn JPG/PNG images into a single PDF.
PDF to JPG
Render each PDF page to a downloadable JPG.
Add Page Numbers to PDF
Stamp page numbers onto a PDF — nothing uploaded.
Watermark PDF
Stamp a text watermark across every PDF page.
Compress PDF
Shrink a PDF's size — processed in your browser.
Everyday
31 toolsQR Code Generator
QR codes for URLs, text, WiFi, and vCards — PNG or SVG.
Color Converter & Picker
Convert HEX ⇄ RGB ⇄ HSL ⇄ HSV with palette ideas.
Unit Converter
Convert length, weight, temp, area, volume, speed, time.
Timezone Converter
Compare a time across up to four zones with DST support.
Online Notepad
Distraction-free notepad that autosaves in your browser.
Countdown Timer
Set hours, minutes and seconds and get a beep when time's up.
Stopwatch
Start, stop, lap and reset with centisecond precision.
Random Number Generator
Generate random numbers in a range, with or without duplicates.
Random Picker
Paste a list and pick one entry at random, fairly.
Dice Roller
Roll any number of dice — d6, d20 or custom sides.
Coin Flip
Flip heads or tails and keep a running tally.
List Randomizer
Shuffle a whole list into a fair random order.
Tally Counter
A big click counter with plus, minus and a custom step.
Love Calculator
Enter two names for a fun, consistent love percentage.
BMR Calculator
Find your resting calorie burn with the Mifflin-St Jeor formula.
Calorie Calculator
Find maintenance calories plus loss and gain targets (TDEE).
Water Intake Calculator
Estimate daily water needs from weight and exercise.
Pace Calculator
Work out running pace, time or distance in km or miles.
GPA Calculator
Add courses and credits for a weighted 4.0-scale GPA.
Countdown to Date
Live countdown of days, hours and minutes to any date.
Age in Days
See your age in total days, weeks, hours and minutes.
Time Duration Calculator
Find the duration between two date-times, down to minutes.
Pomodoro Timer
Focus in 25-minute work / break cycles.
Roll a d4
Roll one or more virtual d4 dice instantly.
Roll a d6
Roll one or more virtual d6 dice instantly.
Roll a d8
Roll one or more virtual d8 dice instantly.
Roll a d10
Roll one or more virtual d10 dice instantly.
Roll a d12
Roll one or more virtual d12 dice instantly.
Roll a d20
Roll one or more virtual d20 dice instantly.
Roll a d100
Roll one or more virtual d100 dice instantly.
Roll Two Dice
Roll two six-sided dice online with instant totals.
No tools match your search. Try another keyword.
Why ToolFeather?
Most online tool sites work, but they watch — loading trackers, dropping cookies, and quietly sending whatever you type to a server. We think a percentage calculator or a JSON formatter has no business collecting your data.
Every tool on ToolFeather runs entirely in your browser, so your numbers, text, images and files never leave your device. We keep no accounts, set no tracking cookies, and store nothing beyond an optional dark-mode preference. That privacy-first, no-nonsense approach is the whole point.