Free Online Tools That Just Work
A growing collection of free, fast, privacy-friendly online tools. No sign-up, no uploads, no tracking of your data — everything runs in your browser.
Latest Tools
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Image Resizer
Resize any image to an exact pixel size, entirely in your browser.
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Crochet Hook Size Chart
Identify an unmarked hook by holding it against your screen, plus the full mm-to-US chart.
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EXIF Remover
Strip GPS and camera metadata from photos in your browser, without re-encoding.
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Compress Image for Email
Shrink a photo to fit an attachment limit, entirely in your browser.
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Minutes to Decimal
Turn hours and minutes into the decimal hours a timesheet expects.
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Paper Size Scale Calculator
The exact percentage to type into your print dialog, with both sheets to scale.
Measurement
View All →Rulers, converters, and sizing tools that work right in your browser.
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Online Ruler
An accurate on-screen ruler in centimetres, inches, and pixels.
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Crochet Hook Size Chart
Identify an unmarked hook by holding it against your screen, plus the full mm-to-US chart.
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Knitting Needle Size Chart
Identify an unmarked needle against your screen, plus the full US-to-mm chart.
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Beads Per Inch
How many beads fill an inch, plus a true-size gauge to identify what you have.
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Sandpaper Grit Chart
CAMI, FEPA and JIS grits against actual particle size — including where they disagree.
Calculators
View All →Fast, single-purpose calculators with no sign-up required.
Text
View All →Counters, formatters, converters, and cleaners for text.
Images
View All →Resize, convert, and inspect images without uploading them anywhere.
Developer
View All →Encoders, formatters, and generators for everyday development work.
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Base64 Decode for Excel
Decode a Base64 cell to text or back to the original file, without a macro.
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Hex to RGB for Excel
Hex, R/G/B, the RGB() formula, and the reversed BGR long Excel actually stores.
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Unix Timestamp to Excel Date
Epoch seconds to an Excel serial and back, with the 1900 bug and 1904 Mac offset.
Why These Tools Are Different
Every tool here runs entirely in your browser. Nothing you type, paste, or measure is uploaded to a server, because there is no server doing the work — the page itself does it on your device.
There is no sign-up, no email wall, and no trial. Each tool loads in well under a second, works on a phone as well as a laptop, and has a dark mode. If a tool ever feels slower or clumsier than the alternative, that is a bug worth reporting.
Suggest a Tool
Missing something? Tell us what you need — most of these tools exist because someone had a small, specific problem and could not find a decent way to solve it.