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YOUR EVERYDAY TOOLBOX
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Free tools for the files, fixes and little tasks
standing between you and the rest of your day.
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THE TOOLBOX
A tool for that.
47 tools. One less workaround.
Filters
Review labels describe recorded checks, not ratings or a guarantee. Real-device verification remains outstanding.
Design
Explore depth of field
Move the aperture, lens and focus. See your shot change.
Live illustration · calculated focus limits
Travel
Compare passport access
A source-backed map, with its gaps clearly shown.
199 passports · compare or combine · dated sources
Images
Resize images
Get your photos into shape. One image or a whole batch.
JPEG / PNG → JPEG / PNG / WebP
Data
Compare CSV files
See added, removed and changed records at a glance.
Match rows by your chosen ID
Video
Trim a video
Keep the part you need. Leave the rest behind.
MP4 / WebM · browser codec support
Writing
Count words
Words, characters and reading time. All in one place.
Text → counts & reading estimate
Coding
Format JSON
Make tangled JSON readable. Check its syntax, too.
Format / validate / compact
Design
Check color contrast
See whether your text and background work together.
Two colors → WCAG contrast results
Utilities
Convert units
Find the right measure, with the calculation shown.
Length / area / volume / temperature
Data
CSV duplicate checker
Find repeated IDs and blank keys in one CSV. Download the records that need a look.
Runs in your browser · Free
Data
CSV column mapper
Put a CSV in the shape you need. Choose columns, rename headers and change the order.
Runs in your browser · Free
Data
CSV ↔ JSON converter
Switch between CSV and flat JSON records. Keep long IDs and number literals intact.
Runs in your browser · Free
Writing
Line-list cleaner
Turn a messy list into a useful one. Trim, deduplicate, sort and download.
Runs in your browser · Free
Data
CSV merger
Merge matching CSV files or keep their combined columns. Review and download one cleanly structured file.
Runs in your browser · Free
Data
CSV splitter
Split a CSV into smaller files or separate groups, with a header in every part and one ZIP download.
Runs in your browser · Free
Data
CSV row filter
Filter CSV records without writing a formula. Preview the matches and download the complete result.
Runs in your browser · Free
Data
CSV rule checker
Reuse your column checks with portable rule files, then download a report of records that need attention.
Runs in your browser · Free
Data
CSV group summary
Summarize a numeric CSV column by category or across the whole file, with explicit blank and invalid-value handling.
Runs in your browser · Free
Data
CSV column profiler
Inspect a CSV before working with it. Download a column-by-column profile without changing your data.
Runs in your browser · Free
Writing
Text comparison
See added, removed and unchanged lines, with original line numbers and a complete comparison report.
Runs in your browser · Free
Coding
URL inspector & UTM builder
Inspect URL components and repeated parameters. Add or update UTM campaign tags while keeping the rest of the address.
Runs in your browser · Free
Coding
File checksum verifier
Hash a file or UTF-8 text on your device. Check an expected SHA-256 value and download the result.
Runs in your browser · Free
Design
Aspect-ratio planner
Visualize a ratio and calculate a missing dimension, with exact fractions and whole-pixel rounding made visible.
Runs in your browser · Free
Math
Exact fraction calculator
Calculate with exact fractions, see the arithmetic steps and compare a mixed number with its decimal approximation.
Runs in your browser · Free
Planning
Count business days
Plan dates around your working week and holidays.
Choose weekdays & enter holidays
Food
Recipe scaler
Resize a recipe with exact mixed numbers, unchanged notes and a readable text download.
Runs in your browser · Free
Utilities
Room paint estimator
Calculate wall and optional ceiling area, deduct openings and round up to whole paint containers.
Runs in your browser · Free
Energy
Appliance energy cost
Plan appliance kWh and cost, including optional standby power, cycling and multiple appliances.
Runs in your browser · Free
Audio
Sine-tone WAV generator
Create a short, quiet sine tone as a downloadable WAV.
Runs in your browser · Free
Audio
PCM WAV trimmer
Keep a time range from a 16-bit PCM WAV without re-encoding its samples.
Runs in your browser · Free
Language
International Morse translator
Translate letters and digits to Morse, or decode space-separated Morse.
Runs in your browser · Free
Language
Spelling alphabet encoder
Spell names and codes with the ICAO letter alphabet.
Runs in your browser · Free
Networking
IPv4 CIDR subnet calculator
Find a subnet’s mask, address range and conventional host count.
Runs in your browser · Free
Networking
IPv6 hex formatter
Expand or shorten a hexadecimal IPv6 address with consistent formatting.
Runs in your browser · Free
Engineering
Resistor color-code decoder
Read a conventional 4-, 5- or 6-band axial resistor code.
Runs in your browser · Free
Engineering
DC LED series-resistor planner
Choose an E12 or E24 series resistor from nominal low-voltage DC inputs.
Runs in your browser · Free
Fun
Dice roller
Roll up to 20 dice, with 2–1,000 sides each.
Runs in your browser · Free
Fun
Random team generator
Shuffle a list into balanced teams, with no saved history.
Runs in your browser · Free
Audio
PCM WAV joiner
Join clips in your chosen order, keeping their PCM samples unchanged.
Runs in your browser · Free
Audio
Normalize WAV audio
Bring a WAV’s sample peak to the level you choose.
16-bit PCM WAV · not loudness matching
Audio
WAV channel editor
Extract a stereo channel, mix to mono, swap channels or duplicate mono.
Runs in your browser · Free
Video
Video contact-sheet maker
Turn a video into timestamped thumbnails and individual PNG frames.
Runs in your browser · Free
Video
Video resizer & cropper
Resize, center crop or rotate a video and review the result.
Runs in your browser · Free
Data
CSV chart builder
Turn a CSV into a clear bar, line or scatter chart.
Runs in your browser · Free
Audio
Audio spectrum explorer
Explore frequencies in a local PCM WAV, one window at a time.
Runs in your browser · Free
Design
Room & furniture-fit planner
Arrange scaled furniture and check space before moving it.
Runs in your browser · Free
Science
Sun & shadow planner
See sun direction and a simple object’s shadow through the day.
Runs in your browser · Free
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THE TOOLFRED WAY
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Open a tool. Do your thing.
Get back to your day.
Straight to the useful part.
No sign-up form between you and a quick fix. Pick a tool and get started.
Clear about the limits.
Supported formats and practical limits are explained before you start.