Private technical tasks and explained calculations
Private data tools. Calculators that show the work.
Browser tools for developers and analysts: format JSON, convert CSV, inspect keys, and calculate with clear steps.
Private technical tasks
- JSON FormatterFormat and inspect JSON in your browser while preserving numeric text, key order, and string escapes. Your data stays on your device.
- CSV and JSON ConverterTurn CSV rows into JSON objects, or JSON back into CSV, in your browser. Handles quoted commas and line breaks, keeps leading zeros, and flattens nested JSON.
- Base64 Encoder and DecoderEncode text to Base64 as UTF-8, or decode Base64 and Base64url to bytes and readable text. Check padding, strict mode, and line breaks.
- URL Encoder and DecoderPercent-encode text as UTF-8 or decode %XX escapes. Choose whether + means a space and whether URL punctuation such as & and = is encoded.
- PEM to Hex ConverterDecode PEM blocks to hexadecimal bytes. Inspect top-level DER tags, lengths, value previews, and byte offsets below the result.
- CSR ParserRead a PEM certificate signing request: subject, public key, signature algorithm, and Subject Alternative Names, parsed in your browser.
Calculators that show the work
- Dice Average and Probability CalculatorCalculate exact dice averages and target odds from plain notation. Compare rolls with advantage, rerolls, keep rules, and capped explosions.
- Punnett Square CalculatorCalculate exact genotype and phenotype ratios for up to four genes, ABO/Rh blood types, and recessive X-linked classroom crosses.
- ADA Wheelchair Ramp Slope CalculatorPlan equal ramp runs, landings, and straight or turning footprints. Check slope, rise, width, handrails, and available length.
- Net Ionic Equation CalculatorPredict double-replacement products from two reactants. Balance molecular and ionic equations, cancel spectators, and explain solubility rules.
- Binary and Hex Calculator with Bit WidthsCalculate fixed-width binary and hex arithmetic with exact 64-bit integers, two's complement results, carry, overflow, and bit diagrams.
- Polynomial Long and Synthetic Division CalculatorDivide polynomials with exact fractions, aligned long division, and expanded synthetic division. Check each quotient and remainder.
Reference guides
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