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Useful tools

78 tools in 12 categories
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01Text02Code03Color04Numbers05Units06Date07Generators08Network09Finance10Privacy11PDF12Images
01

Text

Case

Case Converter

Converts text between uppercase, lowercase and more
123

Character Counter

Counts characters, words and sentences
·−·+7 — 7 pages more for this tool: Russian Morse Code, SOS in Morse Code, Morse Code Numbers, Decode Morse Code, Morse Code Audio Decoder, How to Learn Morse Code, I Love You in Morse Code

Morse code

Two-way translation with sound, light and vibration, a telegraph key and a trainer
«»—

Typographer

Guillemets, dashes and non-breaking spaces, every edit highlighted
AI+2 — 2 pages more for this tool: Cyrillic letters in English text, Remove asterisks and hashes from an AI answer

Clean up AI text

Invisible characters, hidden messages, Markdown asterisks and mixed alphabets
ФИО+6 — 6 pages more for this tool: Russian name in the genitive, Russian name in the dative, Russian name in the accusative, Russian name in the instrumental, Russian name in the prepositional, Russian female surnames

Russian name declension

Six cases, the way back to the nominative, job titles and lists
Layout

Keyboard Layout Fixer

«ghbdtn» becomes «привет»: text typed in the wrong layout
RU/LAT

Transliterator

Converts Russian text to Latin script
Lists

List processing

Column to line, duplicates, sorting, wrapping and comparing two lists
02

Code & Data

Diff

Text comparison

Differences between two texts: lines, words, characters, even invisible ones
chmod+6 — 6 pages more for this tool: Permissions 644 (rw-r--r--), Permissions 755 (rwxr-xr-x), Permissions 600 (rw-------), Permissions 700 (rwx------), Permissions 1777 (sticky), Permissions 777 (rwxrwxrwx)

File permissions (chmod)

Unix permissions: checkboxes, 755, rwxr-xr-x and an ls -l line
HTTP+9 — 9 pages more for this tool: Status 301 — permanent redirect, Status 401 — unauthorized, Status 403 — forbidden, Status 404 — not found, Status 429 — too many requests, Status 500 — internal error, Status 502 — bad gateway, Status 503 — service unavailable, Status 504 — gateway timeout

HTTP status codes

What 404, 500 and 403 mean, who is at fault and what to do
Clean

Clean and inspect a link

Strip utm, fbclid and gclid, inspect domain, path and parameters
tok+1 — 1 page more for this tool: ChatGPT token counter

Token counter

Text tokens in ChatGPT, Qwen, DeepSeek and GigaChat — coloured, with a context window
bot+2 — 2 pages more for this tool: How to block AI bots in robots.txt, llms.txt generator

robots.txt generator

AI bots by class, Yandex and a check of a ready file by Google and Yandex rules
JSON

JSON Formatter

Formats and minifies JSON
URL

URL Encoder

Encodes and decodes URL strings, including strict RFC 3986 and HTML form encoding
Base64

Base64

Encodes and decodes Base64
Hash

MD5 Generator

Generates MD5 hash from a string
JWT

JWT Decoder

Decodes JWT header and payload, verifies signature
RegExp

RegExp Editor

Live match highlighting and explanation of each token
MD+3 — 3 pages more for this tool: Markdown to PDF, Markdown to Word, ChatGPT answer to Word

Markdown to PDF, Word and HTML

Editor with preview: PDF, a Word document with equations and HTML — in your browser
Ŝéţţîñĝŝ

Pseudolocalization

Finds hardcoded strings and future overflow before translation is ordered
03

Color

HEX/RGB/HSL

Color Converter

Converts between HEX, RGB and HSL. Live color preview
Palette

Palette Generator

Builds harmonious color schemes from a single color
WCAG

Contrast Checker

Text and background contrast per WCAG: levels AA and AAA, and how to fix a colour
Gradient+4 — 4 pages more for this tool: Gradient text, Gradient button, Gradient border, Animated gradient

CSS Gradient Generator

Linear, radial and conic gradients with OKLCH blending, a text readability check and export to CSS, Tailwind, SVG and PNG
04

Numbers & Numeral Systems

2/8/10/16

Number Base Converter

Converts numbers between binary, octal, decimal and hexadecimal
AND/OR

Binary Numbers

Bitwise AND/OR/XOR/NOT, shifts and an IEEE 754 float32 breakdown
I·V·X

Roman Numerals

Arabic to Roman numerals and back. Step-by-step breakdown, reference table
HEX

Hexadecimal Numbers

Convert to HEX and back, byte breakdown and hex colours
OCT

Octal Numbers

Convert to octal and a chmod permissions calculator
S · V+19 — 19 pages more for this tool: Area of a square, Area of a rectangle, Area of a triangle, Area of a circle, Area of a sector, Area of a ring, Area of a trapezoid, Area of a parallelogram, Area of a rhombus, Area of an ellipse, Area of a regular polygon, Volume of a cube, Volume of a box, Volume of a cylinder, Volume of a cone, Volume of a frustum, Volume of a sphere, Volume of a pyramid, Volume of a prism

Area and volume calculator

Area, perimeter, volume and surface of 19 shapes — with the formula, substitution and a diagram
05

Units of Measurement

B/KB/MB

Data Units

Bits, bytes, kilobytes, megabytes, gigabytes and terabytes
m/km/mi

Length Units

Millimetres, centimetres, metres, kilometres, miles, inches, feet
g/kg/lb

Mass Units

Grams, kilograms, tonnes, pounds, ounces, pud
°C/°F/K

Temperature Units

Celsius, Fahrenheit, Kelvin and historical scales — all at once
06

Date & Time

Unix

Unix Timestamp

Converts Unix time to a readable date and back. 1741434000 → 8 March 2026
UTC

Timezone Converter

Converts time between UTC and any timezone in the world
ISO 8601+3 — 3 pages more for this tool: Excel serial number to date and back, FILETIME to date and Active Directory timestamps, RFC 2822 date · email and HTTP

Date Formats

Converts between formats: DD.MM.YYYY, ISO 8601, RFC 2822 and others
Age

Age Calculator

Exact age, birth weekday, zodiac signs and days lived
Timer

Timer and stopwatch

Countdown with sound, laps, Pomodoro and interval training
Countdown+102 — 102 pages more for this tool: Days until New Year, Days until Orthodox Christmas, Days until Defender of the Fatherland Day, Days until International Women's Day, Days until Spring and Labour Day, Days until Victory Day, Days until Russia Day, Days until Unity Day, Days until the Old New Year, Days until Epiphany, Days until Tatiana Day, Days until Maslenitsa, Days until Cosmonautics Day, Days until the Last Bell, Days until Youth Day, Days until Ivan Kupala, Days until Family, Love and Fidelity Day, Days until Knowledge Day, Days until Teachers' Day, Days until Father's Day, Days until Russian Mother's Day, Days until Valentine's Day, Days until Pi Day, Days until April Fools' Day, Days until Earth Day, Days until Children's Day, Days until Programmers' Day, Days until Halloween, Days until Black Friday, Days until Cyber Monday, Days until Chinese New Year, Days until Christmas, Days until the start of Great Lent, Days until Palm Sunday, Days until Orthodox Easter, Days until Catholic Easter, Days until Trinity Sunday, Days until Ramadan, Days until Eid al-Fitr, Days until Eid al-Adha, Days until Hanukkah, Days until Passover, Days until St Patrick's Day, Days until US Independence Day, Days until Oktoberfest, Days until the Mid-Autumn Festival, Days until Diwali, Days until Thanksgiving, Days until university admissions open, Days until the application deadline, Days until the competition lists, Days until the enrolment orders, Days until the master's deadline, Days until the start of the EGE exams, Days until the final essay, Days until the final oral interview, Days until the EGE application deadline, Days until the OGE application deadline, Days until the spring holidays, Days until the first-graders' holidays, Days until the school graduation, Days until Scarlet Sails, Days until the summer holidays, Days until the autumn holidays, Days until the winter holidays, Days until summer, Days until autumn, Days until winter, Days until spring, Days until the summer solstice, Days until the winter solstice, Days until the spring equinox, Days until the autumn equinox, Days until the end of the year, Days until the weekend, Days until your birthday, Days until the end of service, Days until the property tax deadline, Days until the 3-NDFL deadline, Days until the OGE, Days until Ded Moroz’s birthday, Days until Sysadmin Day, Days until Tester’s Day, Days until Accountant’s Day, Days until Medical Workers’ Day, Days until Airborne Forces Day, Days until Navy Day, Days until Police Day, Days until Power Engineer’s Day, Days until Builder’s Day, Days until Metallurgist’s Day, Days until Constitution Day, Days until Pokrov, Days until Radonitsa, Days until Parents’ Saturday, Days until the Saviour Day, Days until the 11.11 sale, Days until the 2028 Olympics, Days until the Year 2038 problem, Days until Unix time 2,000,000,000, Days until the school holidays, Countdown widget for your website

How many days until…

A countdown to New Year, Easter, school holidays, exams or your own date
Intervals

Time calculator

Add intervals as a list, shifts with breaks, decimal hours and timecodes
Work+5 — 5 pages more for this tool: Russian work calendar 2026, Russian work calendar 2027, Russian six-day week calendar, Annual Leave Schedule for a Team, Family Vacation Planner

Russian work calendar

Working days, public holidays and hours norms for 2026–2027, each with its formula
Print+21 — 21 pages more for this tool: 2026 calendar, October 2026 calendar, November 2026 calendar, December 2026 calendar, Quarterly calendar 2026, 2027 calendar, January 2027 calendar, February 2027 calendar, March 2027 calendar, April 2027 calendar, May 2027 calendar, June 2027 calendar, July 2027 calendar, August 2027 calendar, September 2027 calendar, October 2027 calendar, November 2027 calendar, December 2027 calendar, Quarterly calendar 2027, Photo calendar, Academic calendar 2026–2027

Printable calendar

A one-page year, a month with room to write or a quarterly calendar — with your own dates and PDF
Δt

Date Difference

Counts days, weeks, months or years between two dates
leave

Annual Leave Planner for Russia

Leave on the Russian work calendar: holidays are not deducted, rest with weekends, days left and a Labour Code check
07

Generators

A1#

Password Generator

Creates strong random passwords with charset settings and entropy
UUID+6 — 6 pages more for this tool: UUID v4 · generator and how it works, UUID v7 · generator and how it works, UUID v1 · generator and how it works, Nil UUID · the zero identifier, NanoID · a short identifier, ULID · a sortable identifier

UUID

UUID v4, v7, v1, NanoID and ULID; check and decode any UUID
Lorem+4 — 4 pages more for this tool: German Lorem Ipsum, Arabic Lorem Ipsum, Chinese Lorem Ipsum, Russian Lorem Ipsum

Lorem Ipsum Generator

Placeholder text and filler: Latin, Cyrillic, HTML, Markdown, JSON
Draw

Random numbers and draws

A number, a winner, teams, an order, dice and a coin
Barcode

Barcode generator

EAN-13, Code 128 and four more formats, code check and GS1 prefix
QR+5 — 5 pages more for this tool: GOST payment QR code, Decode a QR code, Wi-Fi QR code, Business card QR code, Crypto wallet QR code

QR Code Generator

Links, Wi-Fi, contacts, GOST and crypto payments — with a scannability check
ФИО+6 — 6 pages more for this tool: Russian name generator with test IDs, US name and address generator, German name and address generator, UK name and address generator, Kazakh name generator, Belarusian name generator

Person Generator

Fake people from six countries and companies: name, address, IDs, JSON / CSV / SQL
08

Network

CIDR

IPv4 Subnet Calculator

Network address, broadcast, mask, wildcard, subnet splitting
IP/CIDR

IP and CIDR checker

Version, private or public, mask, range and representations of an address
UTM+4 — 4 pages more for this tool: UTM tags for Yandex Direct, UTM tags for VK Ads, UTM tags for Telegram, UTM tags for email newsletters

UTM Builder

Tracking links for ads, posts and newsletters — with a mistake check and batch CSV export
New
09

Finance & Money

₽ in words

Amount in Words

A number spelled out in Russian for invoices and contracts: kopecks, 15 currencies
INN · OGRN

Russian Details Validator

Checksum for INN, KPP, SNILS and OGRN plus decoding: region, tax office, year
% & VAT

Percentage and VAT Calculator

Percentage of a number, discounts and markups, Russian VAT at the 2026 rate
Loan

Loan calculator

Payment, interest and schedule for a loan or mortgage with early repayment
Art. 395+1 — 1 page more for this tool: Article 395 Russian Civil Code Interest Calculator

Late Payment Interest Calculator

Article 395 interest with payments and the moratorium, the key rate today and since 2016
New
₽

Salary and Income Tax Calculator

Russian income tax month by month, with take-home pay
10

Privacy

EXIF

EXIF cleaner

Shows the location, date and camera hidden in a photo and strips them without re-encoding
Favicon

Favicon generator

Five files instead of thirty: ico, an SVG with dark mode, an iOS icon and a manifest
SHA-256

File and text hash

SHA-256, SHA-1, SHA-512 and MD5 with reference comparison — the file never leaves the browser
11

PDF

PDF

PDF tools

Merge, split, rotate, number pages, JPG to PDF and back — files are never uploaded to a server
1 + 2 + 3

Merge PDF

Several files into one, in the order you choose
1-3, 7

Split PDF

Pull out the pages you need or cut the document into parts
JPG → PDF

JPG to PDF

Photos and scans into one PDF, on A4 or sized to the picture
PDF → JPG

PDF to JPG

Pages as pictures at the resolution you need, in a ZIP
90°

Rotate pages

By 90° or 180° — the whole document or chosen pages
− 3

Delete pages

Mark the extra pages and keep the rest
3 · 1 · 2

Reorder pages

Rearrange pages by dragging thumbnails
5 / 20

Number pages

Numbers at the bottom or top, from the page you choose
12

Images

HEIC

Image tools

iPhone HEIC to JPG in batches, without GPS — photos are never uploaded
HEIC · JPG

HEIC to JPG

iPhone photos into JPGs that open everywhere. In batches, without GPS.