345 free online tools
Find a tool by task, format, or name. Check its example and limits before working with PDFs, images, text, or data in your browser.
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Binary and text converter
Encode UTF-8 text or file bytes as eight-bit groups or a MATLAB numeric row vector assignment; decode bit text to exact bytes.
Quoted-printable converter
Encode a MIME body as quoted-printable or decode one to exact bytes and readable text.
SAML response inspector
Decode a SAML 2.0 response locally and inspect SSO status, audience, recipient, NameID and attributes.
Password generator
Generate random passwords that fit a site’s length and character rules.
Passphrase generator
Create a six-word or longer EFF passphrase for a password manager, disk encryption, or an account that accepts long passwords.
SRI hash generator
Calculate SHA-256, SHA-384 or SHA-512 SRI from local file bytes or UTF-8 text, then copy an integrity value or HTML tag.
Business day calculator
Add working days to a date or count a range, with optional standard US federal holidays.
ISO week number
Find an ISO week number, week-year and Monday–Sunday dates for a calendar date.
Duration calculator
Add a list of durations and subtract breaks without wrapping at 24 hours.
Decimal hours converter
Convert a worked duration to decimal hours, or a timesheet decimal back to hours, minutes and seconds.
Calendar event generator
Create a timed or all-day calendar event and download an importable ICS file.
Windows FILETIME converter
Convert Windows and Active Directory FILETIME timestamps to exact UTC dates and back.
ISO 8601 duration converter
Turn ISO 8601 durations into readable time and exact seconds when possible.
Fraction calculator
Add, subtract, multiply and divide fractions, mixed numbers and finite decimals exactly.
Statistics calculator
Calculate list mean, median, variance and standard deviation, or exact decimal statistics for a CSV column.
Weighted average
Pair values with relative or percentage weights and calculate their weighted average.
Numeric rounding and formatting
Round exact decimal input to decimal places or significant digits, or write scientific notation.
Linear interpolation
Estimate Y from two known X/Y points and a target X.
Permutations and combinations
Count ordered arrangements and unordered selections exactly from n distinct items.
Random list picker
Pick one or more names or items from a line-by-line list without reusing a selected line in the same draw.
Color vision preview
Compare a chart or UI palette under three color-vision simulations and grayscale.
Fluid type clamp generator
Calculate CSS clamp() for a font size that grows between two viewport widths, with rem bounds and an adjustable root-size assumption.
SVG pattern generator
Download a seamless single-tile SVG for dot, grid or diagonal web backgrounds.
CSS grid generator
Generate a card grid that adapts to container width, with a narrow preview and copyable CSS.