108 free developer & designer tools that never upload your data
Free developer and designer tools that run entirely in your browser: encode, format, convert, hash, generate and inspect. Nothing is ever uploaded.
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Transform, count, clean and reshape text.
- Case Converter: camelCase, snake_case, kebab & more
- Slugify: URL-safe slugs from any string
- Word & Char Count: Chars, words, lines, read time
- Line Tools: Sort, reverse, dedupe, trim lines
- Find & Replace: Bulk replace with regex support
- Regex Tester: Live match highlighting, groups, flags
- Text Diff: Compare two blocks line by line
- Reverse Text: Flip characters, words or lines
- Whitespace Cleaner: Trim, collapse, strip blank lines
- Word Frequency: Rank words, chars or lines by count
- NATO Phonetic: Spell text as Alfa Bravo Charlie
Encode, decode, hash, cipher and inspect.
Convert bases, compute, randomize.
- Base Converter: Bin / oct / dec / hex live convert
- Calculator: Expression evaluator with history
- Random Number: Ranged, batches, copy out
- Unit Converter: Length, mass, data, temperature
- Percentage: Change, of-total, tip & discount
- Roman Numerals: Arabic ↔ Roman, up to 3999999
- Aspect Ratio: Solve W:H ratios & resize
- Number Formatter: Grouping, decimals, scientific
- Number to Words: Spell out numbers & currency
- Prime & Factors: Primality test & factorization
- CSS Unit Converter: px ↔ rem ↔ em ↔ pt ↔ %
Pretty-print and convert structured data.
Conjure IDs, secrets, codes and filler.
Convert, sample, mix and check color.
Timers, timestamps, cron, timezones and spans.
Headers, queries, subnets and the wire.
Check your camera, mic, speakers, mouse, keyboard, screen & more.
Compress, convert, resize and clean up images, all in your browser.
Merge, split, reorder and build PDFs without uploading them.
Spin, roll, flip, pick and shuffle.
Guides
Read the guides for worked examples and background on the formats these tools handle.