Categories

Categories group tools by the job they help you complete. Choose Files for PDFs and images, Text for writing utilities, or Development for formatting, data, and encoding tasks.

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How to choose and use tools in each category

Prepare PDFs and images for their destination

An upload limit may call for a smaller file, while a document submission needs pages in the right order. Pick the operation that addresses the problem: merging and splitting PDFs change their organization; compression reduces file size; image conversion and resizing change format and dimensions. Applying every step unnecessarily can make the result harder to read.

  1. Merge receipt PDFs in reading order, or split a document to send only the relevant pages. When creating a PDF from JPG images, check orientation and margins before sharing it.
  2. For a file size limit, try Compress PDF or Compress Image and compare size with readability. For a width or height requirement, use Image Resizer; reducing dimensions and changing format solve different problems.
  3. Open the exported file and review every page, small text, colors, and transparency. PDF to JPG turns pages into images; keep the original PDF or image for later edits and another export.

Choose arithmetic, date intervals, or age

The Calculator handles numerical operations, but the difference between dates depends on the calendar. Date Calculator measures intervals or moves a date forward or backward by a period; Age Calculator uses a birth date and a reference date. Keeping these tasks separate avoids treating months of different lengths as fixed blocks of days.

  1. In Calculator, write down the values and operation you want to check. For a calculation with several steps, verify intermediate results before using the total elsewhere.
  2. In Date Calculator, choose between measuring an interval and adding or subtracting a period. Check date order and whether the endpoints are included before interpreting the day count.
  3. In Age Calculator, check the birth date and reference date. Completed years of age are not obtained by dividing days by 365; for contractual deadlines, confirm the counting rule required by the document.

Convert measurements without losing their units

Unit Converter helps compare measurements expressed in different systems, including length, weight, and temperature. Choose the quantity before entering the number: a value without a unit is not a complete measurement. Keep both the source and target units with the result so someone else can reproduce the conversion.

  1. Select the quantity and check both units before entering a value. To compare centimeters with inches, convert the measurements to the same unit instead of comparing bare numbers.
  2. For temperature, do not apply the proportional rule used for length or weight: Celsius and Fahrenheit have different scales and starting points. Use the converter's temperature option.
  3. Avoid rounding at every step. Preserve the available result and round at the end according to the precision of the original measurement; extra decimal places do not make a measurement more accurate.

Prepare data and queries before integration

JSON Formatter and JSON Inspector help read structured data; SQL Formatter organizes queries for review. Base64 and URL Encoder / Decoder handle text representations, while UUID Generator creates identifiers. Choose the tool for your workflow stage: improving presentation does not prove that data meets an API contract or that a query will return the intended result.

  1. Use the formatter to make JSON readable and the inspector to examine its structure. Even when syntax is accepted, check types, required fields, and values against the application's expected schema.
  2. For SQL, select the query's dialect and review the output. Formatting is not validation or code execution: test the query in the appropriate environment before applying it to real data.
  3. Do not enter secrets, tokens, or customer data; use anonymized samples. Base64 is encoding, not encryption; check the round trip when encoding URLs, and do not treat a UUID as a password or access authorization.

Compare amounts with explicit assumptions

Percentage Calculator handles increases, discounts, and changes; Currency Converter estimates equivalents using the available rate; CLT vs Freelance Calculator compares employment scenarios in the Brazilian context. Two results are comparable only when their period, calculation base, and included costs match. Record those assumptions before deciding what the number means.

  1. Identify the percentage base: moving from 100 to 120 is a 20% increase, but returning from 120 to 100 is not a 20% discount. Choose the operation that matches each direction.
  2. In Currency Converter, check the currency pair and the displayed rate date. Compare the estimate with the provider's actual offer, including fees, taxes, and exchange spreads where applicable.
  3. For CLT vs freelance comparisons, check benefits, costs, proposal periods, and the tool's Brazilian assumptions. Results support calculations and are not financial, tax, or legal advice; confirm the applicable conditions before deciding.

Turn a generated password into account protection

Password Generator creates a random credential, but protection also depends on where you use and store it. Check the service's requirements before generating a password, including allowed length and accepted characters. An appropriate password loses some of its value when reused across accounts or stored somewhere exposed.

  1. Set length and character groups to match the service's rules. If it rejects the password, generate another with accepted options instead of manually shortening the same sequence.
  2. Use a unique password for each account and store it in a password manager. Do not reuse a generated credential across services or send it in a conversation as a way to save it.
  3. Enable two-factor authentication where available and keep recovery codes in a safe place. Generating a password here does not change your account password: complete the change within the service itself.

Review text length, changes, and presentation

Word Counter measures a draft's length; Text Comparator shows changes between versions; Case Converter adjusts letter case. Font Generator uses Unicode characters to style short passages. These operations help prepare writing, but they do not replace reading the text in the context where it will be published.

  1. In Word Counter, choose the destination's required metric: words or characters, with or without spaces. Reading time is an estimate; check the limit again after your final edit.
  2. In Text Comparator, keep the original version on one side and the revision on the other. Review differences to confirm additions and deletions; the tool does not decide whether a change improves meaning.
  3. After changing case, review acronyms and proper names. Use Unicode lettering sparingly and test pasting at the destination: these are different characters, not an installed font, and can make searching, reading, and accessibility harder.

Test codes and prepare random choices

QR Code Generator and QR Code Scanner connect content with its visual representation; Barcode Generator prepares images for a compatible reading system. Wheel of Names selects options for informal activities. The on-screen result is only one step: a code must work at its final size and on its final medium, and the wheel's list must represent the intended choices.

  1. After generating a QR code, read the exported image with QR Code Scanner and check its text or address. Test at the intended print size too; when reading an unfamiliar QR code, inspect the destination before opening the link.
  2. For a barcode, choose a format accepted by the destination system and check the data. Test the exported image with the actual reader, preserving contrast and margins; generating an image does not register a product.
  3. In Wheel of Names, review duplicate entries and options before spinning, since repeated entries can change the odds. Test the setup and check the displayed selection; use it for informal choices, not regulated prize draws.