Free Online Tools
PDF, images, video, audio, text, timers, calculators and hardware tests: simple tools that work right in your browser. Free, no sign-up, and your files are never uploaded.
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- PDF to WordConvert a PDF into an editable Word document (.docx) right in your browser, with OCR for scanned PDFs.
- PDF to ExcelConvert a PDF to an Excel file: tables are detected, and amounts and dates become real numbers, ready for your formulas.
- PDF to PowerPointConvert a PDF into a PowerPoint presentation (.pptx): one slide per page, with editable text or a pixel-perfect image, without uploading the file.
- PDF to JPGConvert PDF pages into JPG or PNG images, at the resolution of your choice.
- PDF to TextExtract the text from a PDF, from every page or just a few, then copy it or download it as a .txt file.
- PDF to MarkdownConvert a PDF into clean Markdown (headings, lists, tables, links), ready to paste into an AI chat or your documentation.
- Word to PDFConvert a Word document (.docx) to PDF right in your browser, with a page-by-page preview and text that stays selectable.
- Excel to PDFConvert an Excel (.xlsx) or CSV file into a sharp vector PDF: pick your sheets, fit to page width, preview before downloading.
- PowerPoint to PDFConvert a PowerPoint presentation (.pptx) to PDF in your browser: one page per slide, selectable text, speaker notes optional.
- JPG to PDFTurn your photos and images (JPG, PNG, WebP) into a single PDF file.
- Document ScannerTake a photo of a page with your phone and get a clean scan, as a PDF or JPG.
- Merge PDFCombine several PDFs into a single file, in the order you choose.
- Split PDFExtract pages from a PDF or split it into several files.
- Organize PDFChange the order of a PDF's pages by drag-and-drop, duplicate, rotate, or remove pages.
- Delete PDF PagesRemove unwanted pages from a PDF in one click and download a lighter document.
- Rotate PDFRotate a page or every page of a PDF by 90°, then download the corrected document.
- Crop PDFTrim the margins of a PDF: adjustable crop box, margins in millimeters and automatic detection of white borders.
- Add Page Numbers to PDFAdd page numbers to a PDF: position, “Page 1 of 10” style, starting number and an unnumbered cover page.
- Write on a PDFAdd text, checkmarks, and the date to a PDF, hide a line with whiteout, then download the filled-in document.
- Sign a PDFAdd your handwritten signature to a PDF (drawn, typed, or uploaded) and download it.
- Fill PDF FormFill in the fields of a PDF form online: text, checkboxes, dropdowns and a signature, then download the completed PDF.
- Redact PDFPermanently black out text in a PDF: redaction boxes, word search and automatic detection of personal data.
- Compare PDFCompare two versions of a PDF: added, deleted or changed words highlighted on the pages, plus a visual overlay for drawings and scans.
- Compress PDFShrink a PDF that's too large to email or to upload to a website.
- Password Protect PDFAdd a password to a PDF (AES-256 encryption) and, if you like, block printing, copying or editing.
- Unlock PDFRemove the password from a PDF when you know the password, or lift its printing and copying restrictions.
- Repair PDFRepair a damaged or corrupted PDF that won't open: structure rebuilt, pages recovered and a clear report, without uploading anything.
- OCR PDFMake a scanned PDF searchable and copyable: the recognized text is laid invisibly over the original pages.
- HEIC to JPGConvert your iPhone's HEIC photos to JPG or PNG, in batches.
- WebP to JPGConvert your WebP images to JPG that opens everywhere, in batch and at the quality of your choice.
- PNG to JPGTurn your PNGs into much lighter JPGs, in batch, choosing the quality and background color.
- JPG to PNGConvert your JPG photos to lossless PNG, in batch, to edit or reuse them.
- WebP to PNGConvert your WebP images to PNG while keeping transparency, in batch and with no loss.
- Image to SVGVectorize a PNG or JPG into SVG: flat-color logo, black and white for Cricut or laser cutting, illustration or photo.
- Image to Text (OCR)Copy the text from a photo, a scan, or a screenshot using OCR.
- Compress ImageReduce the size of your JPG, PNG, and WebP photos with no visible loss of quality.
- Compress Image to KBShrink a photo below an exact file size (50 KB, 200 KB, 1 MB…) at the best possible quality, for an online form or application.
- Resize ImageChange the size of your images in pixels or percentage, in batches.
- Crop ImageCrop a photo to square, Instagram, story or 16:9 format and export it at full resolution.
- Flip ImageRotate a photo by 90° or 180°, flip it into a mirror image or straighten it by a precise angle.
- AI Image UpscalerUpscale a photo ×2 or ×4 with AI that adds detail and reduces blur, right in your browser.
- Photo EditorOnline photo editor: brightness, contrast, colors, filters, cropping and straightening, with full-resolution export.
- Remove the Background From an ImageCut out a photo automatically with AI that runs in your browser, and get a transparent PNG.
- Blur ImageHide a face, a license plate, or personal information in a photo with blur, pixelation, or a black bar.
- Add Text to PhotoAdd one or more text boxes to an image, with font, color, outline and shadow, or make a meme.
- Add a WatermarkProtect a copy of your ID or a PDF document by adding a watermark with the recipient and the date.
- Remove Photo MetadataSee what your photos give away (GPS location, phone, date) and remove the EXIF data without losing any quality.
- Photo Collage MakerCombine 2 to 9 photos into one image: ready-made layouts, Instagram, story and A4 formats, high-resolution export.
- Photo to SketchTurn a photo into a pencil sketch, a black line drawing for coloring pages (line art) or a comic style, then download or print it.
- Passport PhotoCrop a photo to ID format (35×45 mm, 2×2 inches…) and download it alone or on a 4×6 in print sheet.
- Online WhiteboardOnline whiteboard and drawing tool: pen, highlighter, eraser, shapes, text, grid or blackboard background, PNG and JPG export.
- Color Picker From ImageFind the HEX, RGB, HSL or CMYK code of any pixel in an image, plus its palette of dominant colors.
- Convert Video to MP4Convert a MOV, MKV, AVI, WMV or WebM video to MP4 that plays on all your devices.
- Compress VideoShrink a video's file size to send it on WhatsApp, by email, or on Discord.
- Convert MP4 to MP3Extract the sound from an MP4, MOV, or WebM video into an MP3 file.
- Video to GIFTurn a video clip into a good-quality animated GIF.
- Screen RecorderRecord your PC or Mac screen with sound, in MP4, directly in your browser.
- Cut / Trim VideoTrim the start or end of a video and keep only the part you want.
- Merge VideosJoin several videos end to end into a single MP4 file, in the order you choose.
- Rotate VideoRotate a video 90° or 180°, or flip it like a mirror, then save it as MP4.
- Change Video SpeedSpeed up or slow down a video from 0.25× to 4×, with natural-sounding audio or no sound at all.
- Remove Audio From VideoStrip the audio track from a video in seconds, with no loss of picture quality, or simply turn its volume down.
- Blur VideoBlur or pixelate a face, a license plate or text in a video, for the whole video or between two points in time.
- Add Subtitles to VideoGenerate automatic subtitles with Whisper AI, edit them, choose their style and burn them into your video.
- Transcribe Audio to TextTranscribe an audio or video file to text with Whisper AI, without uploading it.
- Read Text AloudHave any text read aloud, with the voice and speed of your choice.
- Online Voice RecorderRecord your voice with the mic, play it back, and download it as MP3, with nothing to install.
- Voice ChangerTurn your voice into a robot, helium, monster or alien voice, from your microphone or an audio file.
- MP3 CutterKeep the best part of a song and download it as MP3, or as M4R to make an iPhone ringtone.
- Convert Audio to MP3Convert your M4A, WAV, FLAC, OGG, OPUS, AAC, WMA or AMR files to MP3 at 128, 192 or 320 kbps, several at a time.
- Tone GeneratorPlay a tone at any frequency from 20 to 20,000 Hz to test audio equipment, check your hearing or match a tinnitus pitch.
- White NoiseWhite, pink or brown noise, rain, waves, fan, heartbeat or shushing: mix the sounds and set a sleep timer.
- Guitar TunerTune your guitar with the mic: detected note, needle, and offset in cents.
- Online MetronomeA precise metronome from 30 to 250 BPM, with time signatures, accent, subdivisions, and tap tempo.
- Online PianoA 3-octave virtual piano you can play with your mouse, your fingers, your computer keyboard or a MIDI keyboard, with songs to learn.
- Note Reading PracticePractice reading music notes in treble clef and bass clef, with instant feedback and the sound of each note.
- Word CounterCount your text's words, characters, sentences, and paragraphs live, with reading time.
- Online NotepadFree online notepad that saves your notes automatically in your browser: multiple notes, search, .txt export and printing.
- Text CompareCompare two versions of a text and see what was added or removed, highlighted in color.
- Case ConverterConvert text to UPPERCASE, lowercase, Sentence case or Title Case, and remove accents in one click.
- Fancy Text GeneratorTurn your text into 25+ Unicode font styles to copy and paste on Instagram, TikTok, WhatsApp or Discord.
- Special CharactersSpecial characters and symbols to copy and paste in one click: accented letters, quotes, arrows, math, currencies, hearts, with Alt and HTML codes.
- Discord Colored Text GeneratorColor words in a Discord message (text color, background, bold, underline) and copy the ansi code block, ready to paste.
- Number to WordsConvert a number or an amount into words, spelled correctly, for a check, an invoice, or a contract.
- Roman Numeral ConverterConvert a number to Roman numerals or Roman numerals to a number, with the calculation broken down.
- JSON FormatterValidate, beautify or minify JSON and explore it as a tree, with the exact line and column of any error.
- Password GeneratorCreate strong, random passwords, generated locally in your browser.
- Invoice GeneratorCreate an invoice or a quote online, with VAT per line and automatic totals, then save it as a PDF.
- Resume BuilderMake a free resume online from 3 templates, with an optional photo and a live preview, then save it as a PDF.
- Letter TemplatesSworn statement, cancellation letter, authorization letter, resignation, demand letter: fill in a template and download a ready-to-sign letter as a PDF.
- Signature GeneratorDraw or type your signature and download it as a transparent PNG, ready to insert into any document.
- Barcode GeneratorCreate a UPC-A, EAN-13, EAN-8, Code 128, Code 39 or ITF-14 barcode, with the check digit calculated, as PNG or SVG.
- Open RAR, ZIP or 7z FilesOpen and extract RAR, ZIP, 7z, TAR or GZ archives in your browser, or create a ZIP, with nothing to install.
- CalculatorFree online calculator, standard and scientific: order of operations, trigonometric functions, history, memory and keyboard support.
- Percentage CalculatorFive percentage calculators: share, proportion, change, discount or increase, and initial value, with the detailed formula.
- Rule of Three CalculatorSolve a rule of three online: fill in 3 boxes and the 4th is calculated with cross multiplication explained step by step, for direct or inverse proportion.
- Unit ConverterConvert length, weight, temperature, volume, area and speed between metric and US/imperial units, with the formula.
- VAT CalculatorAdd VAT to a net price or remove it from a gross price, with the VAT amount and the formula, at any rate.
- Gross to Net Salary CalculatorConvert a gross salary to net (or net to gross) per month, year and hour, with take-home pay after income tax withholding.
- Currency ConverterConvert dollars, euros, pounds, Swiss francs and more at the official European Central Bank reference rate, with a 90-day chart.
- Loan CalculatorWork out the monthly payment, total interest, insurance cost and amortization schedule of a mortgage, car loan or personal loan.
- Compound Interest CalculatorSee how your savings grow with compound interest: final balance, interest earned, and a year-by-year table and chart.
- Online TimerA free timer with presets, a large display, and a sound alarm, for cooking, work, or sport.
- Online StopwatchA stopwatch precise to the hundredth of a second, with lap times, best lap, and keyboard shortcuts.
- Countdown TimerCreate a countdown to a specific date and time, and share it with a simple link.
- Pomodoro TimerA Pomodoro timer that alternates focus sessions and breaks, with an alarm, notifications and a session counter.
- Tabata / HIIT TimerInterval training timer: Tabata, HIIT, EMOM or a custom workout, with beeps and voice announcements.
- Exact TimeThe exact time to the second, checked against a server, with today's date, your time zone, a big full-screen clock and world clock.
- Time Zone ConverterConvert a time from one time zone to another and see the time difference with the cities of your choice.
- Date and Age CalculatorCount the days between two dates, add or subtract days from a date, and calculate an exact age.
- Hours CalculatorAdd or subtract times and work out your hours worked per day and per week, in hours:minutes and in decimal hours.
- Week NumberWhat week is it? Today's ISO week number, the week number of any date, the dates of any week and a list of every week of the year.
- Printable CalendarCreate and print a free yearly, half-year or monthly calendar with holidays, on Letter or A4 paper or as a PDF.
- BMI CalculatorCalculate your body mass index from your weight and height, with your WHO category and a healthy weight range.
- Calorie CalculatorEstimate how many calories you need per day based on your profile and activity, with targets to maintain, lose or gain weight.
- Due Date CalculatorEstimate your due date and how many weeks pregnant you are from your last period or the date of conception.
- Breathing ExerciseAnimated breathing guide: coherent breathing 365, 4-6, 4-7-8, box breathing or your own custom pace.
- Online Eye TestEstimate your visual acuity on screen with tumbling E letters, one eye at a time, plus an astigmatism test and a contrast test. A rough screening only.
- Color Blindness TestScreen for red-green or blue-yellow color blindness with 12 colored dot plates, and see a photo the way a color blind person does.
- Hearing TestFind out how old your ears are with higher and higher pitched tones, then compare your left and right ear.
- Multiplication TablesLearn, practice and print the multiplication tables from 1 to 12, with practice mode, a timed challenge and a list of mistakes to review.
- Mental MathPractice mental math: addition, subtraction, multiplication and division, 4 levels, sets of 20 problems or a 60-second challenge.
- Grade CalculatorCalculate your weighted grade average out of 100 or any other scale, and the score you need to reach your target.
- FlashcardsCreate question / answer flashcards and study them with spaced repetition (the Leitner system), right in your browser.
- French Civic Exam PracticePractice for France's 2026 civic exam with 40-question mock exams in 45 minutes, marked and explained, translated into English.
- Typing Speed TestMeasure your typing speed in words per minute (WPM) and your accuracy.
- Spin the WheelEnter your choices, spin the wheel, and let chance pick a winner.
- Random PickerDraw names, numbers, or teams at random, with a reliable random generator.
- Flip a CoinFlip a virtual coin in one click: heads or tails, with exactly a 50/50 chance.
- Dice RollerRoll up to 6 virtual dice, standard or role-playing, with the total calculated automatically.
- Random Number GeneratorPick one or more random numbers between a minimum and a maximum, with or without repeats, using a truly fair draw.
- Truth or DareDraw random truths and dares for each player, with kids, teens and adults levels.
- Would You RatherDraw random "Would you rather… A or B?" questions, let the group vote and see the percentages.
- Who's Most Likely ToDraw "Who's most likely to…?" questions, vote for a player and keep track of the scoreboard.
- Say the Word on BeatThe viral "say the word on beat" game: a grid of 8 boxes lights up to the music, and you say the word in the lit box.
- Categories GameDraw a random letter, pick your categories, start the timer and let the scores add up automatically in this Scattergories-style word game.
- SudokuPlay free sudoku puzzles with a unique solution in 4 levels, or have the solver crack a puzzle from your newspaper.
- Mic TestCheck in seconds that your mic works, with a level meter and playback.
- Webcam TestCheck your webcam live: image, resolution, frame rate, and photo.
- Online MirrorUse your computer's or phone's camera as a mirror, with a ring light and zoom.
- Left-Right Audio TestCheck your headphones, earbuds, or speakers: sound on the left, on the right, a phase test, and a frequency sweep.
- Decibel MeterMeasure the sound level around you in decibels, live, with the microphone of your phone or computer.
- Water EjectPlays a low 165 Hz tone that vibrates your phone speaker to push out water droplets stuck in the grille.
- Dead Pixel TestSpot dead pixels, stuck pixels, and light leaks on your screen in full screen.
- Refresh Rate TestMeasure your monitor's actual refresh rate (60, 144, 240 Hz…), frame time and dropped frames, with a motion smoothness test.
- White ScreenFull-screen white screen in one click, with colors, brightness, warm or cool light, a ring light for video calls and a timer.
- Online RulerActual-size ruler in cm, mm and inches, calibrated with a credit card, with a measuring cursor and a protractor.
- Keyboard TestCheck that every key on your keyboard works, in QWERTY, AZERTY, or QWERTZ.
- Mouse TestTest every button on your mouse, catch ghost double clicks and scroll wheel jumps, and measure the polling rate.
- Controller TesterTest your controller's buttons, triggers and joysticks on PC, and measure stick drift at rest.
- Click Speed Test (CPS)Click as fast as you can and measure your speed in clicks per second (CPS).
- Reaction Time TestMeasure your reflexes in milliseconds: click as soon as the screen turns green.
- Sensitivity ConverterConvert your mouse sensitivity from one game to another (Valorant, CS2, Fortnite, Apex…) while keeping exactly the same cm/360.
- YouTube Thumbnail MakerMake a 1280 × 720 YouTube thumbnail with a cut-out photo, bold titles, arrows and emojis, then export it under 2 MB.
- YouTube Thumbnail DownloaderPaste a video or Short link and download its thumbnail in HD as JPG, PNG or WebP, plus the video's Full HD key frames.
- YouTube TranscriptGet the text of a YouTube video and download it as TXT or SRT.
- Video DownloaderDownload videos from TikTok, Instagram, X, Facebook… as MP4.
- WhatsApp Link GeneratorCreate a wa.me link that opens a WhatsApp chat with a number, with a pre-filled message, a QR code and an HTML button.
- QR Code GeneratorCreate a custom QR code (link, Wi-Fi, vCard…) and download it as PNG or SVG.
- QR Code ScannerScan a QR code on your computer from an image, a screenshot or your webcam, and see what it contains.
- What Is My IP AddressSee your public IP address and your connection details: browser, operating system, screen, language, time zone.
Free online tools, no sign-up required
Chatzam brings together the everyday tools everyone needs at some point: sign or merge a PDF, convert an iPhone photo, shrink an image, trim a video, extract audio from a clip, transcribe a recording, or test your mic before a video call. They're free, require no sign-up, and work on both computer and mobile.
Your files stay on your device
These tools run directly in your browser thanks to open-source technologies (pdf.js, pdf-lib, FFmpeg, Tesseract, Whisper). Your documents, photos, videos, and recordings are never sent to our servers: it's faster, and much safer for your personal data.
Also available: free AI assistants
Alongside these tools, Chatzam offers dozens of free AI assistants (ChatGPT, Claude, Gemini, Mistral…) for writing, summarizing, translating, or learning, with no account required.
Frequently Asked Questions
Are Chatzam's tools really free?
Yes, completely free and with no sign-up. The site is funded by advertising.
Are my files sent to a server?
No. These tools process your files directly in your browser. Only the processing engines (for example FFmpeg or the Whisper model) are downloaded, then cached.
Do the tools work on phones?
Yes, most work on smartphones and tablets. The screen recorder requires a computer, since mobile browsers don't support screen capture.
Is there a limit on file size or number of files?
There's no quota. The only limit is your device's memory, especially for very large videos.